Thanks to the Hubble Space Telescope, astronomers have shed light on a recent chapter in the history of our Milky Way's neighboring galaxy, Andromeda.

Using Hubble Space Telescope observations of Andromeda's stars, a research team showed that the spiral galaxy's rate of making new stars has dramatically slowed down in the last 40 million years. And they've found more evidence that one of Andromeda's own neighbors — a smaller galaxy called M32 — may be to blame.

"We can't explicitly say that we are seeing a decrease in star formation because of M32. But it's right there, and it's definitely the most likely suspect," said Tobin Wainer, a graduate student at the University of Washington and one of the astronomers, in a statement.

Astronomers like Wainer knew from prior research that Andromeda saw a burst of star formation about 2 billion years ago (possibly as a result of a collision with an unknown galaxy). They also knew that star formation had slowed down since then. What they did not know was how quickly that deceleration had been. If they could find out, they could fill in some of the gaps in Andromeda's history.

At 2.5 million light-years' distance, Andromeda is near enough to Earth that Hubble can measure its stars. In the past several years, Hubble has conducted two surveys of Andromeda. While Hubble can only make out stars in Andromeda that are brighter than our sun, these two surveys still gave Wainer and colleagues a compendium of 200 million stars, covering two-thirds of Andromeda's disk.

Wainer and colleagues parceled out this vast space into a grid of squares, 300 light-years to a side. They reconstructed the history of each square by examining the colors of its stars.

A square with many bright blue stars, for example, probably saw a lot of star formation recently, since blue stars tend to be younger. On the other hand, if a square only contains smaller, redder stars, we know those stars are longer-lived and older, and that square probably hasn't seen a lot of newborn stars.

The astronomers mapped out a story of slowing star formation. Around 500 million years ago, on average, Andromeda turned the equivalent of our sun's mass in gas and dust into newborn stars each year. As millions of years passed, that rate declined. About 40 million years ago, it was about one-half the sun's mass each year. Then, it tilted into a dramatic deceleration. Today, it stands at about one-fifth the sun's mass each year.

Curiously, they found that Andromeda's starmaking slowdown is especially pronounced on one particular side of the galaxy, starting about 60 million years ago. Astronomers know this side of Andromeda is closest to another galaxy: M32.

Astronomers have eyed M32 with suspicion for some time now. M32 is only located about 16,000 light-years from Andromeda (Andromeda is formally called M31) and it looks like the rump core of a spiral galaxy that lost its arms. It's possible that this is actually the aftermath of a collision between M32 and its larger neighbor. It's possible, though not confirmed, that Andromeda's slowing bears the fingerprints of this collision.

We may not need to wait long for more answers. Just as Hubble can see Andromeda's stars, so too will the Nancy Grace Roman Space Telescope, set to launch in late August. In the coming years, Roman will be able to measure even more of Andromeda than Hubble has.

Scientists have captured the sharpest image ever of our sun's surface. This view has revealed incredible new details about the inner mechanisms driving stellar activity.

What is it?

An international team of researchers using the U.S. National Science Foundation's Inouye Solar Telescope has captured the highest-resolution view of the sun's surface.

In analyzing observations from this telescope, the team, made up of researchers from the National Solar Observatory, the NSF NCR High Altitude Observatory and the German Max Planck Institut für Sonnensystemforschung, discovered strange patterns on the sun's surface. The whirling patterns, they found, are actually evidence of what's called Kelvin-Helmholtz instability (KHI), or instability that happens when there is a change in velocity of fluids.

Why is it incredible?

This image is groundbreaking. Capturing the highest-resolution view of the sun's surface is a massive accomplishment, and in the time-lapse video above, you can even see the fluid dynamics on the surface of the sun in motion.

But this view is much more than a beautiful, high-resolution image. These observations have revealed swirls on the sun's surface at the edges of the magnetic areas, allowing the team to identify KHI on the sun's surface. This fluid instability has long been suspected on the sun, but these observations are the first time they have ever been directly seen like this.

“We believe that the discovery of Kelvin-Helmholtz Instability in the solar photosphere, backed up by analysis of numerical simulations, is a major step forward in our understanding of the dynamics and evolution of solar and stellar plasma, and will serve as a basis for future discoveries," David Boboltz, the deputy director at the National Solar Observatory, said in a statement.

A paper describing these findings was published recently in the journal Nature.

Pluto's atmosphere appears to be freezing out as the dwarf planet moves ever further away from the sun, according to careful observations of Pluto astronomers made as it was seen passing in front of stars in the sky.

Pluto is already cold. Its surface temperature is about –382 degrees Fahrenheit (–230 degrees Celsius), while its upper atmosphere is a little warmer at –333 degrees Fahrenheit (–203 degrees Celsius). As Pluto moves away from the sun it will grow even colder and its nitrogen-rich atmosphere should start to collapse and freeze out, condensing as frost on the frigid surface.

Now, a team led by Amanda Sickafoose of Arizona's Planetary Science Institute believe they have seen the onset of this process. "We're at a particularly interesting point for Pluto," said Sickafoose in a statement. "Our work suggests that the atmosphere has recently started decreasing in pressure."

Pluto's orbit is highly elliptical and very oblique to the ecliptic plane of the solar system. In fact, so eccentric is Pluto's orbit that for ten years either side of its perihelion in 1989 (when Pluto was closest to the sun), it was actually closer to the sun than Neptune was.

However, ever since 1989 Pluto has been moving away from the sun on its 248-year-long orbit – we've not even seen Pluto complete half of its orbit yet since its discovery in 1930. Pluto will reach its furthest point from the sun – called aphelion – in the year 2114 when it will be about 49 astronomical units (7.3 billion kilometers/4.6 billion miles) distant.

When NASA's New Horizons mission flew past Pluto in July 2015, it measured Pluto's atmospheric pressure to be 10 microbars. This is a tiny amount, millions of times lower than the atmospheric pressure on Earth, resulting from Pluto's thin nitrogen atmosphere that also contains hazes made from organic molecules including methane and carbon monoxide.

With New Horizons now having flown past Pluto and deeper into the Kuiper Belt, astronomers have to instead rely on more distant and less direct means of keeping tabs on Pluto's atmosphere. From our point of view on Earth, Pluto is sometimes seen to pass in front of a distant star. This is called a stellar occultation. When an airless body, such as an asteroid, occults (or hides) a background star the star's light winks out in an instant, before suddenly reappearing. When there is an atmosphere involved, however, the light of the star doesn't go out all at once when blocked by Pluto, but steadily fades as the atmosphere scatters and refracts the starlight before the star vanishes behind the dwarf planet's solid body.

Between 2017 and 2023, Sickafoose's team probed Pluto's atmosphere during ten occultations of stars ranging in brightness from about magnitude 12 to magnitude 18, far below naked-eye visibility.

Observing stellar occultations is not always a simple matter. They are not visible from everywhere on Earth, but only along narrow tracks, often in difficult to reach areas. The tracks, which are just a few kilometers wide, are effectively Pluto's shadow falling on the Earth. By spacing observers across the width of the track, it is possible to measure the extent of Pluto's atmosphere (there usually also has to be an unlucky observer just outside the track to confirm that is indeed the edge of the shadow track).

"I'm constantly amazed at how the simple technique of watching starlight dim and reappear allows us to study a thin atmosphere – a few millionths of the Earth's – on a world two-thirds the size of our moon and 30 times farther from the sun," said Sickafoose.

Of the ten occultations, four could be seen from observatories in multiple locations, which meant that the different observatories could confirm each other's results.

"We often prefer to observe predicted occultations that have shadow paths over large observatories because that equipment and data have proven successful," said Sickafoose. "Then, we try to improve those datasets by collaborating with local observers in the shadow paths."

Previous work had suggested that Pluto's atmosphere began freezing out in 2018, but Sickafoose's team found that actually, Pluto's atmosphere remained constant from 2015 to midway through 2021. However, between mid-2021 and the last occultation that Sickafoose's team observed in 2023, Pluto's atmospheric pressure dropped by 16 per cent.

The pressure drop was deduced from the light curves, which show how the star's brightness changed with time during an occultation. The light curves revealed that while the structure of Pluto's upper atmosphere remained fixed, the lower atmosphere changed.

Sickafoose's team interprets this as being the haze particles settling towards lower latitudes. This is what is expected to happen when the atmospheric pressure drops.

"I am hopeful that we'll be able to get more data in the next years to decades to specifically confirm or refute this trend," said Sickafoose.

It is thought that Pluto's atmosphere won't have completely frozen onto the dwarf planet's surface by the time it reaches aphelion, and then as Pluto begins moving in towards the sun once more the feeble solar heating that Pluto receives will slowly begin to increase, causing nitrogen frost to sublimate from the surface and thicken the atmosphere once more.

The findings were published on July 31 in the Planetary Science Journal.

As usual, SpaceX is dreaming big.

The company plans to build factories on the moon, using robots to do much of the heavy lifting, Elon Musk said on Tuesday (Aug. 4) during SpaceX's first-ever quarterly earnings call.

"We are going to land a lot of tonnage on the moon," he said. "We're going to build the factories on the moon. The robots will be helpful with that."

This is not a newly revealed vision; Musk first laid it out in February, in a blog post that announced SpaceX's purchase of xAI, a company that the billionaire entrepreneur founded in 2023. But Musk doubled down on it this week, showing investors that off-Earth manufacturing is very much front-of-mind for SpaceX.

The factories in question will build SpaceX's Starmind AI satellites, if all goes according to plan. The company aims to operate a million-strong Starmind constellation in Earth orbit in the coming years, and then go farther afield with the craft after that.

Eventually, SpaceX wants to launch locally made Starmind satellites off the lunar surface using electromagnetic mass drivers — basically, extremely powerful rail guns.

"Using robots on the moon to scale up manufacturing on the moon — which, I know it sounds, like, super sci-fi right now, but it's going to happen — will enable us to build the mass accelerator on the moon," Musk said.

"And if you have a mass accelerator on the moon, and you have solar and radiator production on the moon, you can — I know this sounds totally nuts — but you can you can probably scale to 1,000 times the economy of Earth in terms of intelligence launched to space, but probably, you know, maybe even a million times," he added.

"Solar and radiator production" refers to the manufacture of key Starmind satellite components: solar panels to power them and radiators to dump the large amounts of heat they'll produce into the vacuum of space.

Musk didn't provide details about the robotic lunar labor force. But he's presumably counting on Optimus, a humanoid robot built by another one of his companies, the carmaker Tesla. Musk has previously said that SpaceX will launch some Optimus units to Mars in the near future, to help pave the way for human settlement of the Red Planet.

Those robots will fly on Starship, SpaceX's fully reusable next-gen megarocket, which is currently gearing up for its 14th test flight. Indeed, Starship is key to most of the company's plan's both in Earth orbit and beyond.

"Starship aims to quadruple payload capacity and reduce launch costs by 10 times compared to our Falcon 9 rocket, unlocking significant capabilities across all of our business segments," SpaceX Chief Financial Officer Bret Johnsen said during Tuesday's earnings call.

"We continue to make progress building the infrastructure required to support thousands of Starship launches per year, including accelerating Raptor and launch vehicle production, the buildout of our gigabays, and making significant progress towards activating multiple launch pads at Starbase and in Cape Canaveral at Pad 39A and Pad 37," he added. (Raptor is the engine that powers Starship, and Starbase is SpaceX's South Texas site, which serves as the current hub of Starship manufacturing, testing and launch activities.)

Tuesday's call was a landmark for SpaceX — its first as a publicly traded company. Musk founded SpaceX as a private concern in March 2022 and took it public this past June, via the richest IPO in history.

The IPO raised $86 billion and valued SpaceX at $1.77 trillion. Only six American companies had higher market capitalizations at the time — NVIDIA, Apple, Alphabet (Google), Microsoft, Amazon and the semiconductor manufacturer Broadcom. (Market caps fluctuate all the time, going up and down with companies' stock prices.)

The main point of Tuesday's call was to discuss SpaceX's first-ever earnings report, which covered the second quarter of this year. The company's revenue over that stretch was $7.8 billion, a 92% increase over the same period in 2025, according to the report. SpaceX lost more money than it made during Q2 2026, but the shortfall was considerably smaller than in Q2 2025 — $541 million versus $1.0 billion.

New evidence has come to light showing that the mysterious 'little red dots' discovered in the early universe by the James Webb Space Telescope could evolve into the active centers of fully formed galaxies.

"Everything created in the early universe must evolve into something around us," said George Rieke of the University of Arizona in a statement. "We have had little idea of what little red dots become, but these results finally show us how to find their progeny."

Discovered by the James Webb Space Telescope (JWST) almost as soon as it became operational in 2022, little red dots have been a perplexing cosmological mystery. As their name suggests, they appear small, red and surprisingly bright. They are mostly found at redshift values suggesting they existed between 13.2 and 12.2 billion years ago. To shine so brightly at such great distances would usually imply these objects are quasars — which are luminous nuclei of galaxies powered by active supermassive black holes — but the light coming from little red dots is more like that of bloated stars. It looks to be mostly in infrared with some ultraviolet, and none of the X-rays that one would expect from an active black hole chomping down on material.

As such, researchers have come up with the hypothesis that little red dots are "black hole stars," or vast clouds of gas heated from within by a concealed but growing supermassive black hole.

However, the population of little red dots drops off a cliff at redshifts equating to less than 12 billion years ago. Where did they all go? There are two options. Either they all died off, or they developed into objects more familiar to us.

One recent hypothesis is that little red dots turned into large globular clusters. And now, an alternative possibility has come along.

A team led by Pierluigi Rinaldi, who was at the University of Arizona's Steward Observatory when conducting this research but is now at the Space Telescope Science Institute (STScI) in Baltimore, think it has identified a descendent of a little red dot. It appears to be in the form of a distant galaxy, catalogued as WISEA J123635.56+621424.2, which is found at a redshift of 2, meaning that we see it as it was 10.5 billion years ago.

The galaxy displays neat spiral arms around a red core. Rinaldi's team have nicknamed it the Saguaro, after a species of cactus native to the Sonoran desert in the United States' south-west, thanks to the galaxy's arms and how its core resembles the red fruit produced by the cactus.

Saguaro's core has all the hallmarks of a little red dot. It shines bright in infrared as seen by JWST, and also emits in ultraviolet as detected by the Hubble Space Telescope. Yet, NASA's Chandra X-ray Observatory has also detected faint X-rays originating from Saguaro.

"What the X-ray observations show is that this galaxy has an active galactic nucleus, and a very obscured one at that," Carys Gilbert of the University of Cape Town in South Africa, who participated in the study alongside Rinaldi, said in the statement. "It's not only obscured but also X-ray weak. That kind of combination could explain the lack of X-ray emission that we see from all other little red dots. It fits the puzzle of little red dots nicely."

This is not the first time X-rays have been seen coming from a little red dot. Earlier this year it was reported that scattered X-rays were seen breaking through from a little red dot called 3DHST-AEGIS-12014, given credence to the hypothesis that little red dots are black hole stars, where the black hole gradually consumes the "star" from the inside out, eventually carving holes through which X-rays can escape. We see 3DHST-AEGIS-12014 as it was 11.8 billion years ago, meaning that Saguaro, which existed 1.3 billion years later, is a little bit further on in its development.

"Because the Saguaro is at lower redshift, we can see the very beautiful and bright host galaxy in high resolution and detail with Webb and Hubble," said Harvard's Zihao Wu, who was also part of Rinaldi's team.

Intrigued, Rinaldi's team simulated how Saguaro would appear to us if it existed a billion years after the big bang. Much of its galactic structure would either be less developed or simply just too faint to be seen at such distance. All that would be visible would be the nucleus, looking very much like all the other little red dots.

This implies that little red dots are not a unique population of their own, but are simply a phase in the development of galaxies with supermassive black holes. Our own Milky Way could have been a little red dot once upon a time.

Saguaro is a crucial link in the story of little red dots and how they connect with modern galaxies. While there is still much to learn, such as the beginning of their story and how they form, the middle and end of their story is now beginning to take shape.

The findings were reported on 29 July in The Astrophysical Journal.

Picture it: A swarm of tiny robot helicopters descends through a reddish-brown sky, landing gracefully on the Martian surface. What are they wearing? Tiny capes.

NASA's SkyFall mission will send a trio of mini rotorcraft to Mars equipped with ground penetrating radar technology which happens to look like little capes. These uniquely designed swaths of fabric look decidedly strange or even accidental in new videos from NASA's Jet Propulsion Laboratory (JPL) that show the little drones practice landing. But these capes are actually flexible antennae that will allow the craft to peer beneath the Red Planet's surface in search of water ice.

"The only way to detect shallow subsurface ice remotely is to fly close to the ground," Adrian Tang, SkyFall’s ground-penetrating radar lead instrument scientist at JPL, said in a statement on Thursday (Aug. 6). "By flying low and slow, a SkyFall helicopter could capture radar images that resolve the fine layering where dry soil gives way to ice, detecting its presence and mapping its extent."

Orbiting spacecraft have studied Mars for decades, imaging the planet and mapping it with radar. But from orbit, their radar is unable to see the first few feet of material just below the planet's surface — a zone where scientists expect to find shallow ice deposits mixed in with the rocks and dust. This work could be important for future astronauts who need to better understand the ground below their feet for safety reasons, and for future travelers searching for accessible ice to process for drinking water, oxygen and fuel.

Skyfall will follow in the footsteps of Ingenuity, the first rotorcraft on another world, which hitched a ride to Mars aboard NASA's Perseverance rover. The new choppers are based heavily on Ingenuity, which weighed just 4 pounds (1.8 kilograms) here on Earth. But Skyfall will be more capable than Ingenuity, whose main job was to show that choppers can explore the thin skies of Mars.

SkyFall's tiny cape ground-penetrating radar, which uses a type of flexible antenna called Vivaldi that was invented back in 1978, is designed to survey up to 16 feet (5 meters) below the Martian surface. The radar will be able to reach anywhere from several yards below the planet's surface to the uppermost layers of surface material.

And the antenna's unique design ensures that the SkyFall drones will be able to make these subsurface observations without damaging the equipment during landing.. The antenna is extremely lightweight, and the team miniaturized it to be both the right size and shape to fit the tiny helicopters, which sit just 6 inches (15 centimeters) above the ground at rest. The tricky thing was, the designers had to miniaturize the radar antennae while maintaining functionality. But they did just that, and these tiny radar capes will be able to bend and move out of the way as the rotorcraft do their thing, flying above and landing on the Red Planet.

"Although we managed to shrink the antenna quite a bit, it is about 1.5 times longer than the helicopter’s legs," Christine Gebara, SkyFall ground-penetrating radar mechanical lead at JPL, added in the statement.

"That means during landing, the Vivaldi has to bend out of the way — and if it lands on a rock, it bends even further," she added. "But when the helicopter takes off again, the antenna must spring back into place for data collection. Because SkyFall is expected to make dozens of flights exploring Mars, we needed an antenna that could repeatedly handle those pressures without losing its shape in flight."

To make these little capes capable of withstanding incredible feats on another world, the engineers behind the helicopters covered the antenna in layers of polyester and Vectran, a flexible (but incredibly strong) material that was previously used for the airbag that cushioned NASA's Spirit and Opportunity Mars rovers during their touchdowns in 2004. The antenna's shape is also reinforced with flexible fiberglass tape springs and a lightweight structure. In total, each antenna weighs a miniscule 5 ounces (142 grams).

But a crafty design isn't enough. Getting to Mars is no small feat, and NASA needs to be sure that these little helicopters and their gear are up to the challenge. So, in JPL's Environmental Test Laboratory, which recreates different elements of environments beyond Earth, the SkyFall team put the rotorcraft and its little radar antenna to the test. They bent and flexed the antenna over and over, recreating multiple landings on the surface, exposed the craft to extreme temperatures, and continually checked to make sure that, throughout this testing, the helicopter could still transmit and receive radar signals. At the end of this testing, the antenna had endured 200 simulated Mars landings and was still working just fine. That is more than twice the number of landings expected from the mission.

"This test checked every box it was supposed to and answered our biggest technical questions," Tang added. "While we still have work ahead of us before the antenna is fully flight-qualified, this was a major milestone, and the hardware performed exactly as expected."

The trio of SkyFall helicopters will put their radar capes to the ultimate test when they fly to Mars. NASA plans to launch this mission to the Red Planet in 2028 aboard NASA's Space Reactor-1 Freedom, the first nuclear fission-powered interplanetary spacecraft.

In a nebula far, far away, colossal clouds of dust and gas tower amongst the stars.

What is it?

This spectacular new image from the James Webb Space Telescope showcases the brilliant majesty of the Carina Nebula, a giant cloud of dust and gas found 7,500 light-years away in the constellation Carina.

You may have seen the Carina Nebula before — in the first-ever image released from JWST, which has been dubbed "Cosmic Cliffs."

In this new image, captured by JWST's Near-Infrared Camera (NIRCam), you can see the nebula in a whole new light. This snapshot captures a specific feature that is being dubbed the "Treasure Chest," as it vaguely resembles a glowing coffer overflowing with stellar jewels.

This "Treasure Chest" contains a cluster of young stars, approximately 70 stars in total. While these might be young, growing stars, the most massive of the bunch is a whopping 19 times more massive than our sun.

Why is it incredible?

While JWST has looked at the Carina Nebula before, new observations can reveal completely new details and help scientists uncover new information about the nebula and the strange ways in which the universe works.

Right now, scientists think that the star cluster in the "Treasure Chest" is about 1.3 million years old. However, previous estimates thought the grouping could be just 100,000 years old. So, new observations by powerful telescopes like JWST can significantly change our understanding of the cosmos.

With each new observation or data point, the history and context of the universe around us could completely transform. And, as this star cluster grows over time, its stars will become more brilliant. They may therefore illuminate more of this star cluster, potentially revealing details and secrets of this "treasure" that scientists might never have predicted.

The final resting place of SpaceX's moon-smashing rocket has been found.

The Korea Pathfinder Lunar Orbiter, known as Danuri, has captured imagery of the crater blasted out by the Falcon 9 upper stage that slammed into the moon early on Wednesday morning (Aug. 5).

"Danuri began observations about 30 minutes before the collision and, through orbit control, passed over the impact site multiple times, conducting a total of 8 imaging sessions," officials with the Korea Aerospace Research Institute (KARI) said via X this morning (Aug. 6). "Through this observation, changes in the terrain around the impact site and traces of ejecta spread were confirmed."

"Danuri secured both pre-collision and immediate post-collision footage, enabling analysis of changes caused solely by the collision and providing important research data," they added in the X post, which shared several before-and-after images of the impact site.

The Falcon 9 in question launched on Jan. 15, 2025, sending two private robotic moon landers — Firefly Aerospace's Blue Ghost and ispace's Resilience — to a high, moon-crossing Earth orbit. The duo then made their own way to the moon; Blue Ghost landed successfully on March 2 of that year, but Resilience crashed during its touchdown attempt.

The Falcon 9's first stage came back to Earth shortly after liftoff for recovery and reuse, as such boosters commonly do. Falcon 9 upper stages, by contrast, are expendable. SpaceX usually disposes of them in Earth's atmosphere, but the upper stage on the Blue Ghost-Resilience mission used almost all of its fuel getting its payloads to their distant destination. So the 8,800-pound (4,000 kilograms) rocket body remained up there, orbiting Earth — until solar activity and gravitational forces pushed it on a collision course for the moon.

That collision occurred at 2:34 a.m. EDT (0634 GMT) on Wednesday, according to KARI officials — right in line with predictions. Scientists calculated some other parameters ahead of time as well. For example, the rocket body probably hit the moon at about 5,400 mph (8,690 kph), gouging out a crater up to 89 feet (27 meters) wide.

The new observations by Danuri, as well as future work by other lunar probes, will help verify such predictions.

"The observation data secured by Danuri will be linked with follow-up observations from NASA's Lunar Reconnaissance Orbiter (LRO) and utilized in international collaborative research," KARI officials said in the X post.

It may be that some ground-based telescopes caught the impact as well. Astronomers at the Instituto de Astrofísica de Andalucía in Spain believe they captured a video of ejected material blasting off of the lunar surface around the predicted time of impact:

The Falcon 9 upper stage wasn't the first rocket body to slam into the moon. The third stage of a Chinese Long March 3C crashed into the lunar surface on March 4, 2022, for example. And the third stage of NASA's Saturn V rocket gouged out craters during multiple Apollo moon missions.

Danuri is South Korea's first lunar probe. The spacecraft launched on Aug. 4, 2022 atop a Falcon 9 and began circling the moon four months later. It carries six payloads, five of them provided by Korean universities and research organizations. The sixth is a NASA instrument called ShadowCam, which hunts for signs of water ice in permanently shadowed regions at the lunar poles.

A spent rocket body hitting the moon made headlines this week, but the reality is that the unplanned collision by a SpaceX upper stage was just the latest in a long history of human-made objects meeting their end by impacting the lunar surface.

Astronomers around the world kept their telescopes trained on the moon early Wednesday morning (Aug. 5), when the rocket stage from a January 2025 U.S. commercial lunar landing mission was calculated to strike the celestial body. Though the fate of the SpaceX Falcon 9 part was unintentional — solar activity and gravitational forces caused the stage to slam into the moon — the impact offered a rare opportunity to try to observe the flash from the impact and the plume of lunar material it sent flying.

By noon (EDT) on Wednesday, there were no confirmed reports of the impact being caught on film, but a telescope in Chile spotted the debris plume, according to the Associated Press.

"This rare occurrence has decades of history, going back to the Apollo era," wrote Jared Isaacman, NASA's administrator, in a post to his social media accounts. "The reality is that meteoroids strike the lunar surface hourly, with impacts comparable to this upper stage occurring roughly every six days."

Inventorying the impacts

The moon is peppered with the scattered metal remains of missions that missed their mark, came down too quickly or were purposefully sent careening into the regolith to learn more about the makeup of Earth's natural satellite.

In fact, the very first mission to successfully fly by the moon was intended to be an impactor. The former Soviet Union's Luna 1 probe was designed to hit the moon but instead zoomed past its target and entered orbit around the sun on Jan. 2, 1959.

Luna 2, launched nine months later, became humanity's first object to reach the lunar surface, purposefully slamming into Sinus Lunicus ("Bay of Lunik"), along the southeastern edge of Mare Imbrium, on Sept. 14, 1959.

The U.S. followed suit, though not as NASA intended, with the Ranger 4 probe impacting the far side of the moon on April 26, 1962. The mission had included an impactor, but both it and its lander failed to operate due to a failure to deploy the spacecraft's solar arrays.

Once humans began arriving on the moon with NASA's Apollo program, scientists found another reason to direct spent rocket and spacecraft stages into a collision course with the surface. Beginning with Apollo 11 in 1969 and concluding with Apollo 16 in 1972, seismometers were placed on the moon to measure natural "moonquakes" and the effects on the moon when the missions' Saturn SIV-B stages and Apollo lunar module descent stages made hard landings.

The data collected helped geologists learn more about the interior makeup of the moon, including that a rocky mantle exists under the outer crust.

After Apollo, planned impacts (and missions) slowed down, if not outright stopped, but the SpaceX collision on Wednesday was not the first in more than 50 years. Between 1993 and today, 11 probes — four from China, three from Japan, two from the U.S. and one each from India and the European Space Agency (ESA) — were intentionally deorbited at the end of the end of their missions around the moon.

Some of these impacts were performed to discard the craft, but others — like Lunar Prospector, LCROSS and Chandrayaan-1 — helped confirm the presence of water by examining the resulting plume.

Unintentional collisions are fewer in number, as are rocket stages, but are not unprecedented. A rocket body that hit the moon's far side in March 2022, leaving behind a small double crater, was later identified as a Long March 3C rocket that launched China's Chang'e 5-T1 mission around the moon in 2014.

Litter versus liability

Without a large human population on the moon, the risk that these planned and unplanned impacts present at current is minimal. But the concern rises as NASA and other world space agencies, as well as commercial interests, begin to increase the pace on establishing their now-planned sustainable facilities for astronauts to live and work on the lunar surface.

"The future lunar base will incorporate reusable spacecraft that not only deliver astronauts and payloads, but also become part of the infrastructure itself," Isaacman said in his post, referring to how reuse can be a way to reduce the number of vehicles needed to be discarded of on the moon.

The Artemis Accords, an internationally agreed-upon set of standards led by NASA and currently signed onto by 70 countries, also includes a provision for its members that spacecraft and their associated rocket components must be disposed of safely.

Early this morning, a SpaceX rocket slammed into the moon at seven times the speed of sound. Now, lunar orbiters are trying to get a look at the aftermath.

This morning (Aug. 5) at about 2:35 a.m. EDT (0635 GMT), the upper stage of a SpaceX Falcon 9 rocket crashed into the moon. To dissect what exactly happened, scientists are looking for imagery of the crash site, with the help of a couple of moon probes.

"NASA’s Lunar Reconnaissance Orbiter and NASA’s ShadowCam instrument on the Korea Pathfinder Lunar Orbiter will look for opportunities to capture before‑and‑after imagery of the impact site," NASA spokesperson Rob Garner, of NASA's Goddard Space Flight Center in Maryland, told Space.com. "Image availability depends on several factors, including the impact location, lighting conditions, and when each spacecraft’s orbit next carries it over the area, which may take a few days to receive any imagery."

While you've likely seen the first stages of Falcon 9 rockets gracefully land back on Earth for reuse, the rocket's 9,000-pound (4,000 kilograms) upper stage is disposable. Typically, it's sent to burn up in our atmosphere after its missions are over.

However, that wasn't possible with this rocket, which launched two private lunar landers — Firefly Aerospace's Blue Ghost and Tokyo-based ispace's Resilience — to a high, moon-crossing Earth orbit in January 2025. The Falcon 9 upper stage used most of its fuel getting to this distant location and couldn't make it back to deorbit in Earth's atmosphere.

So the company performed a different maneuver to take care of this upper stage, Julianna Scheiman, director of NASA science and Dragon programs at SpaceX, said during a press conference on Aug. 3.

"For high-energy missions, we need to perform a different maneuver to ensure the second stage itself is safe per the appropriate rules and regulations, and so we did that here," she said.

But the rocket body was still subject to natural forces, which acted on it over time.

"What has happened is, essentially, a mixture of solar activity and gravity forces have put it on a path towards the moon," Scheiman said.

The Falcon 9 upper stage ended up slamming into the moon this morning at about 5,400 mph (8,690 kph). It likely blasted out a crater up to 89 feet (27 meters) wide, according to scientists' calculations.

This was certainly not the original intended outcome for this rocket. But it presents an opportunity for researchers, who plan to take advantage of it to learn more about the moon.

"NASA’s Meteoroid Environments Office will attempt to image the impact around the predicted time using ground‑based telescopes at the agency's Marshall Space Flight Center in Huntsville [Alabama]," Garner added. "Because the impact flash and plume are expected to be faint, the chance of seeing anything from Earth remains low, and local weather can affect observations as well. Any data collected will help scientists better understand impacts from artificial objects and the potential effects on future lunar exploration."

Today's impact took place on the sunlit side of the moon, the brightness of which made observations difficult for skywatchers hoping to watch the crash from afar with telescopes. But the two lunar orbiters might be able to see not just the crash and impact crater but also the plume of dust kicked up by the rocket's death dive.

So far, observations from Earth have revealed some information. Scientists at the Lowell Observatory in Flagstaff, Arizona reported detections of a lunar plume from the impact.

"We can safely say that we measured a response from the rocket stage impact as a sodium and lithium gas plume a few 10’s of kilometers in size lasting between 5 and 10 minutes after impact," Carl Schmidt told Inside Outer Space's Leonard David.

Such images of the event would provide "an opportunity to test pipelines for measuring flash properties to locate impact events seismically, and to better understand the multi-modal hazards posed to future lunar infrastructure and astronauts from space debris impacting the moon," researchers led by Benjamin Fernando of Los Alamos National Laboratory in New Mexico wrote in a recent paper discussing the then-upcoming event.

So hold tight, as researchers are now eagerly collecting and analyzing the images captured by these orbiters, and we might get images of the rocket crash, the lunar plumes and remaining aftermath soon.

Astronomers have captured the death of a massive star from its first faint flash of X-rays, revealing an unusual explosion that may bridge the gap between ordinary supernovas and more extreme, gamma-ray-burst-producing stellar explosions

The event began in March 2026, when China's Einstein Probe spacecraft detected a brief X-ray flash from a galaxy about 500 million light-years away. Follow-up observations identified the source, initially designated EP260321a and later named supernova SN 2026gzf, as a broad-lined Type Ic supernova.

Such explosions occur when massive stars that have lost their outer layers of hydrogen and helium collapse. They are often associated with narrow, powerful jets traveling near the speed of light and, in some cases, brilliant gamma-ray bursts. But SN 2026gzf produced neither.

Instead, the initial X-ray signal appears to have been a "shock breakout" — the moment the blast wave generated by a collapsing star reaches its surface and releases its first burst of radiation. The flash was the faintest shock breakout yet linked to a broad-lined Type Ic supernova, according to the research team.

Because shock breakouts generally last only seconds to hours, astronomers rarely detect them. In this case, rapid observations by a network of space- and ground-based telescopes, including a number of NSF NOIRLab observatories, allowed researchers to follow the supernova across multiple wavelengths throughout its early life.

"Our observations allowed us to study the physics of three pieces of this explosion: the X-ray shock breakout, the accompanying supernova, and the interaction of the supernova with material previously cast out by the dying star," Jillian Rastinejad, who led one study on the event, said in a statement. "With this information we were able to map out the structure of the material surrounding the star and understand the star's violent lifestyle before it collapsed."

The observations suggest that the progenitor was a Wolf-Rayet star born with about 20 times the mass of the sun. Before exploding, it had shed its hydrogen and helium, leaving behind a core composed largely of carbon and oxygen.

Researchers also found evidence of multiple shells of material surrounding the star. Those shells were likely expelled during turbulent bouts of mass loss shortly before the explosion, giving astronomers an unusually detailed view of the star's final stages.

The discovery suggests that energetic, broad-lined Type Ic supernovas do not always produce gamma-ray bursts or relativistic jets. Instead, massive stars may reach similar-looking explosions through a wider variety of pathways than astronomers previously recognized.

"Going forward, I'm excited to observe more shock breakout events in similar detail to test if all stripped stars have a similar 'lifestyle' prior to collapse and what, if any, differences we see," said Gokul Srinivasaragavan, a member of Rastinejad's team.

NASA's Curiosity Mars rover spotted surprising shapes in the Red Planet soil while exploring a large valley.

What is it?

These images were captured on June 19 and 20, 2026, or the 4,930th and 4,931st Martian days of Curiosity's mission. They show honeycomb-like patterns referred to as "polygonal fractures" found in a valley on Mars known as Valle Grande. They measure about 1.5 to 3 inches (4 to 8 centimeters) across.

While Curiosity has seen other curious geometric patterns on Mars before, scientists were surprised by this most recent find.

"We've seen a lot of fascinating landscapes through Curiosity's eyes, but this sea of polygons took our breath away," project scientist Ashwin Vasavada of NASA's Jet Propulsion Laboratory said in a statement. "We measured their shapes and chemistry carefully and are hopeful there are clues in the data as to how these features formed."

Why is it incredible?

This field of polygons in Valle Grande extends as far as Curiosity's instruments could see, even around the base of a steep hill scientists named "Miraflores."

While mission scientists have theories about how these structures form, it ultimately remains a mystery how they formed.

It's thought that changes in temperatures on Mars could have caused water to squeeze through sediment layers, but scientists will need to collect more data before they can reach a conclusive answer.

Planting boots on Mars is hard enough. But getting "breathing room" on the Red Planet without inhaling toxic dust is yet another issue.

Given NASA's plans to eventually put astronauts on the Red Planet, the agency assembled a Martian Dust Limit Working Group earlier this year to review what's known and unknown about the toxicological hazard to human crews from exposure to Mars dust. The ultimate goal was to establish a permissible exposure limit for humans on the Red Planet by compiling a comprehensive set of expert perspectives regarding Martian dust toxicology, exposure pathways and mitigation strategies.

The working group's conclusions reinforced the view that an initial Martian dust standard "must balance conservatism with operational feasibility while accommodating architectural and scientific uncertainty," the report states. Furthermore, the report explains, "as additional Martian data and toxicological research become available, this standard should be periodically revisited to ensure continued protection of crew health during human exploration of Mars."

Unique study

A panel member for that study was Brian Hynek professor in the Department of Earth Science and a research associate at the Laboratory for Atmospheric and Space Physics, both at the University of Colorado, Boulder.

"It was a unique study," Hynek told Space.com, conducted by NASA specialists, space medicine experts, habitat designers, including toxicologists, volcanologists and geologists. "The task was to help gauge health hazards to humans, both for short and long-term stays," he said.

Just highlighting the differences between the moon and Mars played a role, said Hynek. "The moon is worse in some ways and Mars is worse in other ways."

Disneyland of dust

To be sure, one outcome from Apollo moonwalkers – the "dusty dozen" – is that dealing with lunar dust proved to be troublesome, much more than expected. The aged moon is a Disneyland of dust and crews that went there attested to that fact.

Once out and about, moonwalkers coped with very fine, tiny particles composed of sharp, glassy material. Lunar dust stuck to everything it came in contact with; dust eroded their spacesuits, caused overheating on equipment and instrumentation, compromised seals on their spacesuits, even irritated the eyes and lungs of moonwalkers.

"On Mars, dust particles are a little more rounded, not as jagged and cutting into you. But then you have all the extra chemical components and minerals that you don't have on the moon, like really unhealthy perchlorates," Hynek said. "We can use the lunar knowledge, but Mars is a totally different place," he added.

Heavy metals

Hynek noted that Martian dust is known to contain various carcinogens, such as silica and numerous heavy metals. He co-authored a recent paper on "Potential Health Impacts, Treatments, and Countermeasures of Martian Dust on Future Human Space Exploration."

"There's talk about growing crops on Mars," Hynek observed. "The martian soil is full of all these nasty chemicals. So the astronauts might get more exposure from what they are growing on Mars than the actual airborne dust," said Hynek.

Then there's the dust that will assuredly find its way into the habitat, Hynek said, so engineers are looking at filtering systems and just how much time will be required to clean the inside of the habitat.

"It's good to have the forethought and to start considering the Martian dust and its hazards. It poses a lot more health hazards than the lunar dust," Hynek concluded.

Learned our lesson

Joel Levine, a research professor in applied science at William and Mary in Williamsburg, Virginia, is a leading expert on lunar dust, engineering and safety concerns. He was not a panel member of the NASA report.

Levine cited earlier thinking from a recent National Academy of Sciences report on human exploration of Mars. Two goals noted in that 2026 report are Mars dust-related:

• Determine what controls the onset and evolution of major dust storms, which dominate present-day atmospheric variability.
• Characterize the effects of Martian dust on human physiology and hardware lifetime.

"This indicates that Mars dust is on the minds of mission planners! This is good news based on our experience with lunar dust on the Apollo landings," said Levine. "It looks like we learned our lesson about dust at future human landing sites."

Levine stated that Mars sample returns would be very helpful to characterize Martian dust samples for chemical composition and other qualities. "Unfortunately, it does not look like the Mars samples already collected will ever be returned to the Earth for analysis," he said.

Major takeaways

Shaunna Morrison, an associate professor in the Department of Earth and Planetary Sciences at Rutgers University in New Jersey, served as a panel member on the Martian Dust Limit Working Group.

"One of the major takeaways from the Mars dust working group is that martian dust is a real crew-health and engineering issue, but it is also a tractable one if it is treated as a design requirement from the beginning," Morrison emphasized.

The worry is not that Mars dust is uniquely or catastrophically toxic based on what we know now, Morrison told Space.com.

"The concern is that future crews will be living and working in a closed habitat, repeatedly going outside, bringing dust back in on suits and equipment, in a low-humidity environment," said Morrison. That's a condition in which small particles are more prone to becoming airborne and potentially inhaled, she said, and potentially crew members being exposed to fine respirable particles over many days.

Prevention first

Morrison said that a key point is that we do not have as yet returned samples of authentic airborne martian dust. So NASA has to build a conservative standard using the best available evidence: lunar dust toxicology, Mars simulant studies, and the very extensive chemical and mineralogical datasets from Mars rovers and landers, she pointed out.

"The best strategy is prevention first," Morrison said. "Keep as much dust as possible outside the habitat, remove it quickly when it gets in, monitor airborne particles, and design the system so crews are not relying on medical countermeasures after exposure," she advised.

A discarded SpaceX Falcon 9 upper stage is on a collision course with the moon, and skywatchers may be wondering whether they'll be able to witness the rare event firsthand when it slams into the lunar surface early Wednesday morning (Aug. 5).

The 45-foot-long (13.8-meter), 8,000-pound (4,000-kilogram) rocket stage, left over from the January 2025 launch of Firefly Aerospace's Blue Ghost and ispace's Hakuto-R lunar missions, is expected to strike the moon at about 2:35 a.m. EDT (0635 UTC) on Aug. 5. Traveling at roughly 5,400 mph (8,700 km/h), the impact will occur near the moon's western limb, close to Einstein Crater on the moon's Earth-facing side.

While the collision itself is unlikely to be visible from Earth, observers may have a chance to spot what's known as an ejecta plume rising above the lunar surface. Depending on the force of the impact, debris could be blasted high enough above the moon to stand out against the blackness of space, making it briefly visible to observers on Earth, according to Project Pluto. "Maybe we'll see the flash. Maybe we'll see rocks ejected from the crater. Maybe we'll even see both," astronomer Bill Gray, who first identified the rocket stage's eventual lunar collision, wrote on his Project Pluto website.

The rocket is expected to strike a sunlit portion of the moon near its edge as seen from Earth. Any flash from the impact itself is expected to be washed out by the bright lunar surface.

However, material blasted high above the lunar horizon could briefly become visible against the darkness of space, creating a faint plume that advanced amateur astronomers may be able to capture with sufficiently large telescopes and cameras. Recent simulations suggest the central ejecta plume could climb as high as 60 miles (100 kilometers), though whether it will be detectable from Earth remains uncertain.

Even if conditions cooperate, viewing won't be ideal for much of North America. At the time of impact, the moon will sit only about 40 degrees above the southeastern horizon for observers along the U.S. East Coast, giving skywatchers a relatively low viewing angle before dawn. Observers in parts of South America may have more favorable viewing conditions, with the moon higher in the sky during the event, according to Project Pluto.

Regardless of whether the impact can be seen from Earth, several spacecraft will be watching from much closer vantage points.

South Korea's Danuri lunar orbiter is expected to observe the impact in real time, offering a unique view from lunar orbit. Meanwhile, NASA's Lunar Reconnaissance Orbiter (LRO) will photograph the impact site before and after the collision, allowing researchers to measure the newly formed crater and compare it with other human-made impacts on the moon.

Whether or not the ejecta plume is spotted from Earth, researchers say the accidental crash represents a valuable scientific opportunity. Unlike natural meteoroids, the hollow aluminum rocket stage will strike the moon with well-known size, mass and velocity, giving scientists a rare chance to test models of how impacts excavate lunar material and create craters.

The observations could also help researchers better understand the hazards posed by space debris as both crewed and robotic missions to the moon become increasingly common, if all goes according to plan.

NASA astronaut Anil Menon captured an incredible photograph of a swirling typhoon in the Pacific Ocean from the International Space Station on Aug. 2, 2026.

What is it?

According to his post on X sharing the image, Menon used an iPhone to capture the photo from the space station's cupola, a domed structure built by the European Space Agency that features six circumferential windows and central nadir viewing window.

The photograph shows a massive swirling typhoon in the Pacific Ocean. While Menon doesn't mention the storm or its location by name, it appears to be Super Typhoon Dolphin, the fifth tropical cyclone to reach category 5 in 2026. It has since been downgraded to a category 3 storm, and is expected to weaken to a category 1 or 2 as it continues to move westward towards Japan's Okinawa island.

Why is it incredible?

Aside from being a reminder of how powerful some storms on Earth can be, Menon's photograph shows just how far astronaut photography has come.

Even equipped with only a phone camera, astronauts can capture breathtaking photos to share with the world. On NASA's recent Artemis II mission around the moon and back, the four crewmembers beamed back incredible images captured with iPhones. They even sometimes used them as "mirrors" while shaving.

Menon's photo, like other space station photography, also drives home just how mind-boggling of an engineering feat the International Space Station (ISS) truly is.

There are currently seven people aboard the football-field-sized orbital laboratory, circling Earth every 90 minutes at a speed of 17,500 miles per hour (28,000 kilometers/hour) at an average altitude of around 250 miles (400 km).

Since 2000, the ISS has hosted international crews and has been the site of countless groundbreaking scientific experiments made possible by its microgravity environment. But the station is reaching the end of its life; NASA plans to retire it and crash it in into the Pacific Ocean around 2030.

More than 20 years after NASA's Spirit rover began exploring Mars, scientists have uncovered a hidden clue in its archival data that adds to mounting evidence that the Red Planet was once rich in liquid water.

Researchers reanalyzed measurements collected by Spirit between 2004 and 2010, revealing widespread traces of crystalline hematite and altered magnetite in ordinary Martian soil — iron-bearing minerals that point to ancient chemical changes consistent with interactions between water and rock. The findings suggest liquid water may have been more widespread across Mars than scientists previously thought, according to a statement from Edith Cowan University (ECU) in Australia.

The team combined hundreds of individual measurements from 32 undisturbed soil sites inside Gusev Crater, where Spirit landed in January 2004, creating the most detailed iron-mineral profile yet assembled for typical Martian soil, according to the statement.

"One of the most important discoveries was finding crystalline hematite in ordinary Martian soil," Paulo de Souza, lead author of the study and an ECU professor, said in the statement. "This mineral's widespread presence suggests not only that water was present, but that significant areas of Mars may have once been covered by water."

Crystalline hematite has long been considered one of the strongest mineral indicators of past water on Mars. While it can also form through volcanic or hydrothermal activity, it commonly develops when iron-bearing rocks interact with liquid water.

The discovery is particularly significant because previous analyses concluded that crystalline hematite was largely absent from Spirit's landing site. According to the researchers, the mineral's signature was simply too faint to stand out in individual rover measurements. By combining thousands of spectra collected over the mission, however, the team was able to tease the signal out of the background noise.

The researchers also identified altered magnetite, suggesting the original volcanic minerals in the Martian soil were chemically transformed over time. Together, the altered magnetite and crystalline hematite provide new evidence that water played an important role in reshaping the planet's surface. And, because similar dust and soil blanket much of Mars, the findings could have implications well beyond Gusev Crater, suggesting water-related chemical processes may have been more widespread across the planet than previously believed.

The results add to a growing body of evidence that Mars was once far more habitable than it is today. During its mission, Spirit discovered water-altered rocks and minerals in the Columbia Hills, while NASA's Curiosity rover later found evidence that Gale Crater once hosted long-lived lakes. More recently, Perseverance has been exploring the remnants of an ancient river delta inside Jezero Crater, where scientists hope to determine whether the environment could once have supported microbial life.

Beyond revealing another chapter of Mars' watery past, the research also highlights the lasting scientific value of spacecraft data long after a mission has ended.

"This work shows that important discoveries are not always made by collecting new data," de Souza said in the statement. "Sometimes they come from looking at existing data with fresh eyes and better analytical techniques."

Their findings were published June 26 in the journal Interactions.

This rocket wasn't supposed to die so dramatically.

On Wednesday (Aug. 5) at about 2:35 a.m. EDT (0635 GMT), the upper stage of a SpaceX Falcon 9 rocket will slam into the moon, blasting out a crater about 89 feet (27 meters) wide.

The rocket body has been loitering lazily high above Earth for more than 18 months. What jolted it out of its unremarkable senescence and put it on a kamikaze course for the moon?

It didn't take much, as the rocket regularly crossed into the moon's neck of the woods.

The Falcon 9 launched in January 2025, carrying aloft two private robotic lunar landers — Firefly Aerospace's Blue Ghost and Resilience, which was built by the Tokyo-based company ispace. (Blue Ghost landed successfully and carried out its historic mission, but Resilience crashed during its touchdown attempt.)

Falcon 9 first stages are famously reusable, but the vehicle's upper stages fly just once. SpaceX usually deorbits these rocket bodies shortly after launch, guiding them back for controlled destruction in Earth's atmosphere. That wasn't possible on the Blue Ghost-Resilience launch, however, as getting the lunar probes to their distant deployment point used up almost all of the upper stage's fuel.

As a result, the 8,800-pound (4,000 kilograms) rocket body "was abandoned in a moon-crossing high-Earth orbit," according to a recent study about the coming impact led by Benjamin Fernando of Los Alamos National Laboratory in New Mexico.

SpaceX performed "a different maneuver [than deorbiting] to ensure that the second stage itself is safe per the appropriate rules and regulations," Julianna Scheiman, director of NASA science and Dragon programs at SpaceX, said today (Aug. 3) during a press conference discussing the company's Crew-13 astronaut launch to the International Space Station, which is targeted for Sept. 12.

That maneuver did not lock the hunk of space junk into a stable location, however; natural forces still acted upon it and, it turns out, changed its trajectory.

"What has happened is, essentially, a mixture of solar activity and gravity forces have put it on a path towards the moon," Scheiman said.

Astronomers and lunar scientists are looking forward to the upcoming impact, even though it will occur on the sunlit side of the moon and therefore likely won't be visible to most observers here on Earth (though skywatchers with good telescopes might be able to catch a glimpse of the resulting ejecta plume).

The event "provides an opportunity to test pipelines for measuring flash properties to locate impact events seismically, and to better understand the multi-modal hazards posed to future lunar infrastructure and astronauts from space debris impacting the moon," Fernando and his colleagues wrote in their paper.

Those hazards won't be purely hypothetical for much longer, if all goes to plan: NASA aims to build a base near the moon's south pole over the coming decade via its Artemis program, and to keep that outpost staffed over the long haul. Scheiman said that SpaceX is looking into ways to minimize the chances that spent rocket bodies could rain down on an occupied moon in the future.

"It's one of the things that we're working in partnership with NASA and the other appropriate agencies," she said. "What is the best future disposal path for high-energy missions that are in the sun-Earth-moon system?"

This Falcon 9 won't be blazing an entirely new trail to the moon. The third stage of NASA's Saturn V moon rocket struck the lunar surface on multiple Apollo missions, for example. And, on March 4, 2022, a mysterious rocket body slammed into the moon, blasting out a weird double crater.

That shape revealed the impactor's identity — the upper stage of the Long March 3C rocket that sent China's uncrewed Chang'e 5-T1 mission around the moon in October 2014.

Three of Neptune's moons might have been born from the remnants of ancient icy worlds shattered by Neptune's largest moon, Triton, a new study finds.

These findings suggest further research of these moons might give researchers an unprecedented look at the innards of icy worlds.

"The interiors of large icy moons are normally permanently hidden from us, buried beneath thick shells of water ice," study lead author Ryleigh Davis, a planetary scientist currently at the University of California, San Diego, told Space.com. "Neptune's inner moons may be the only place in the solar system where we can directly observe that material, because a catastrophic event essentially turned those ancient worlds inside out."

Triton is by far the largest of Neptune's 16 known moons. More than 99 percent of the mass of all of Neptune's moons is concentrated in Triton, which is roughly the size of Pluto, Davis said.

Whereas the largest moons of the solar system's other giant planets all orbit their worlds in the same direction as those planets spin, Neptune's largest moon, Triton, orbits in the opposite direction. This unusual configuration suggests the Neptunian system evolved in a dramatically different way than those of its siblings. Instead of Triton forming around Neptune, as the largest moons of the other giant planets likely did around their worlds, Triton's backward orbit has led researchers to suspect "it was captured from the outer solar system," Davis said.

When Neptune captured Triton with its gravity, Triton may have acted like a giant wrecking ball, smashing many of the moons Neptune may have originally had, Davis said. However, much remained uncertain about what happened in the aftermath of this destruction.

To shed light on the mysteries of Neptune's history, scientists investigated Neptune's rings and three of its moons — Larissa, Galatea, and Proteus. Discovered in 1989 with the Voyager 2 flyby of Neptune, these moons are small and close to Neptune, orbiting just outside the planet's main rings. Their locations and tiny sizes have made it difficult for astronomers to study them in detail from Earth.

In the new study, the researchers analyzed near-infrared light from those inner moons using the James Webb Space Telescope . This data helped reveal their chemical makeup for the first time.

The rings and two of the inner moons — Larissa and Galatea — possessed clay minerals previously unseen on the surfaces of bodies in the outer solar system beyond Jupiter. Specifically, they contain magnesium-rich phyllosilicates, commonly found in main belt asteroids and carbonaceous chondrite meteorites.

"The most surprising thing is simply that we found clay minerals at all," said Davis, who conducted this research at the California Institute of Technology in Pasadena. "That was genuinely not on our list of things we expected to find."

These minerals require major prolonged heating to form. One likely place they were created was the deep interior of a large icy body, where heat might come from radioactive material and other sources.

As such, the researchers suggest these minerals are evidence Triton may have demolished Neptune's original moons. The rubble could then come together, forming Neptune's inner moons, with the clay minerals exposed on their surfaces.

Another possibility is that these clay minerals came from a dwarf planet similar in size to Pluto that passed too close to Neptune. Neptune's gravity might then have shredded this dwarf planet apart, Davis said.

These clay minerals only form in the presence of liquid water. Mysteriously, no water ice was detected in any of the three moons studied or the rings.

"That's really surprising because everything out in this part of the solar system is really icy," Davis said in a statement. "So, we're fairly confident that they had to come from deep inside something that was big enough to generate enough heat that it melted its water ice. We think the most likely place would be an original system of icy moons, although it's a bit of a mystery where the ice may have gone."

The scientists noted they did not see these clay minerals on Proteus, the biggest of the three moons they investigated. They suggested it might have formed from a clay-mineral-poor part of the debris, or experienced subsequent heating that destroyed any such minerals.

Curiously, the scientists found all three moons and the rings had a hydrated mineral the researchers were not able to identify. "Identifying it will likely require new laboratory measurements under outer solar system conditions, which is technically challenging but doable," Davis said.

To learn more about Neptune, a spacecraft dedicated to visiting the planet "is the obvious next step," Davis said. "We've had only a single flyby — Voyager 2 in 1989 — and these results make clear there's much more to learn. The main obstacle is time and resources: an ice giant mission was identified as a high priority in the most recent Planetary Science Decadal Survey, but these missions take decades to develop."

The scientists detailed their findings July 29 in the journal Science Advances.

New images reveal what astronomers believe is the first-known "trilobate" or three-headed asteroid in our solar system.

What is it?

These new images capture the asteroid known as (44) Nysa, or just Nysa, as it spins through the main asteroid belt located between Mars and Jupiter. The images were captured with the Very Large Telescope in Chile and the Large Binocular Telescope in Arizona.

Nysa was first observed in 1857, but it wasn't until the new images were captured when scientists were able to resolve its unique three-headed structure. The asteroid appears to be around 47 miles (75 kilometers) in circumference at its widest point, with two narrow "necks" that give it its odd "trilobate" shape.

Even more incredible, astronomers were also able to resolve that a 0.6-mile-wide (1-km-wide) moon seems to orbit Nysa. The tiny moon, currently known as S/2026 (44) 1, appears to orbit the asteroid at a distance of around 106 miles (170 km).

Why is it incredible?

Astronomers say these images reveal (44) Nysa to be unlike any other asteroid we've seen in our neck of the cosmic woods.

"The images reveal a remarkably unusual object," said Kate Minker of Arizona's Lowell Observatory in a statement announcing the discovery. "The most likely explanation is that Nysa is either a contact trinary, consisting of three connected components, or an extremely irregular coherent body unlike anything we've previously observed."

Scientists can study asteroids like Nysa to learn about how the planets of our solar system formed. Nysa belongs to a class of asteroids believed to have formed closer to the inner solar system and therefore may have a similar composition to the building blocks that would go on to form the inner planets.

Astronomers have used the Very Large Telescope (VLT) to observe the violent outflow of material from a distant black hole. The observation once again shows that even the hungriest black holes are extremely messy eaters, while also revealing the "digestive processes" of these cosmic titans in unprecedented detail.

The research focuses on the black hole system Swift J1727.8−1613, located around 8,800 light-years away, and a violent bout of cosmic indigestion and the bright eruptions the system triggered back in 2023. That episode is what initially led to the discovery of Swift J1727.8−1613 in 2023, and it resulted in the system becoming one of the brightest X-ray sources in the sky over Earth.

A team of astronomers has now discovered that as this black hole greedily stripped a star of its stellar material, some of this matter was consumed, but other stellar material was blasted back into space as high-speed jets and powerful black hole winds. They also found that the most massive outflows of material happened when the black hole's feeding activity was much lower than previously thought. The upshot of this is the conclusion that black holes aren't quite the "bottomless pits" scientists had assumed, but are far more like complex cosmic digestive systems.

"People often imagine black holes simply swallowing everything around them," team leader Noel Castro Segura of the University of Warwick in the UK said in a statement. "What we're seeing is a much more complex process. Matter falls in, the system processes it, and a surprising amount is expelled again."

The changing face of a feeding black hole

Swift J1727.8−1613 consists of a black hole surrounded by a swirling platter of material pulled away from a companion star. This matter still has angular momentum, or rotation, so it can't directly fall to the black hole, but instead forms this structure, called an accretion disk.

The immense gravitational influence of the black hole generates intense tidal forces and friction in the accretion disk, superheating it and causing it to glow brightly.

The observations of this glowing disk conducted by Segura and colleagues differ from previous studies of black hole outbursts because their detailed study allowed them to watch the Swift J1727.8−1613 system change over time as it fed on a star.

The resulting "movie" of this feeding black hole revealed that as the cosmic titan blasted out jets, the accretion disk slowly feeding it underwent changes of its own.

That gives scientists a rare and fleeting insight into the connection that exists between matter falling to the maw of a black hole and the material being blasted out at near light-speed as jets of plasma.

The team also found that even after the feeding frenzy of this black hole had subsided, it seemed to still be powering black hole winds of dense gas. They suggest that the amount of material flung away by the black hole may eventually amount to the same mass as that consumed by the black hole, meaning half of its stellar meal was eventually lost to space.

"If black holes can continue shedding material even after their largest outbursts, it means they may be much less efficient eaters than we previously assumed," Segura added. "A significant fraction of the meal may never reach the black hole at all, changing our understanding of how binary stars in galaxies evolve."

The fact that this team was able to observe the entire feeding cycle of this black hole from its initial flare to its dramatic and rather windy end paints a clearer and more dynamic picture of this process than scientists have ever had access to before.

"We usually gravitate towards the dramatic fireworks when a black hole outburst begins, but our observations show that the finale can be just as intense," Kyle Solomons, Doctoral Researcher at the University of Cape Town, said.

The team's research was published on Wednesday (July 29) in the Monthly Notices of the Royal Astronomical Society (MNRAS).

Scientists once suspected that a brutal, years-long winter starved the dinosaurs following an asteroid impact 66 million years ago. New evidence suggests a more violent end: widespread firestorms that may have burned even thick-skinned dinosaurs to a crisp within hours.

The roughly six-mile-wide (10-kilometer-wide) asteroid struck Mexico's Yucatán Peninsula, excavating the Chicxulub crater and vaporizing enormous quantities of rock. Some of that material condensed into tiny droplets called spherules, which spread around the planet before falling back through Earth's atmosphere at several miles per second.

As the spherules slowed, their kinetic energy became heat, producing an intense pulse of thermal radiation. Earlier models suggested the effect would have resembled a worldwide broiler that was potentially deadly to exposed, thin-skinned animals, but not powerful enough to ignite vegetation across the globe.

A new study argues that those calculations overlooked a crucial ingredient: a thick layer of fine silicate dust formed from rock vapor that did not initially condense into spherules. Evidence for that dust emerged in 2023 from the Tanis fossil site in North Dakota, where researchers identified a layer of extremely fine, impact-derived material deposited above the spherules. A similar dust layer has since been documented at the K–Pg boundary (which divides the "age of reptiles" and the "age of mammals") in Raton Basin across the Colorado–New Mexico border.

"It reinvigorated my interest in what happened to the leftover vapor — that's where this work started," lead author Brandon Johnson, a planetary scientist at Purdue University, said in a statement.

The dust would have acted like an insulating blanket, preventing thermal radiation from escaping into space and redirecting more heat toward Earth’s surface. The researchers estimated that the surface heat pulse could have been about 3.5 times more intense than what was suggested by models considering the falling spherules alone. "We're in the realm where we might be essentially killing off everything within that first hour or two," Johnson said.

The radiation may not have directly ignited thick pieces of wood, but it exceeded ignition thresholds for grass, lichen, and pine needles, which could have fueled larger fires. The study also found that exposed terrestrial animals may have received about 17 times the thermal dose considered lethal to humans.

Animals sheltering underground or in water would have had a better chance of surviving the initial heat pulse. Afterward, the same dust may have blocked sunlight for years, triggering the prolonged "impact winter" more typically blamed for the dinosaurs' extinction.

There is, however, a missing element: the wildfire evidence that supports this dust-caused inferno theory has only been found in North America. "It could be that we will eventually find the record of completely global wildfires," said Alfio Alessandro Chiarenza, a paleontologist at University College London who was not involved in the study. "We just don't have it so far."

The study was published on July 28 in the journal JGR Biogeosciences.

Some of the brightest objects in the universe may also hold the key to understanding how galaxies evolve — especially when gravity transforms them into giant cosmic magnifying glasses.

Using artificial intelligence to search through data from the Dark Energy Spectroscopic Instrument (DESI), astronomers have identified seven promising candidates for quasars acting as gravitational lenses — natural cosmic magnifying glasses created when a massive object's gravity bends and magnifies light from a more distant object.

These unusual systems could help researchers better understand how actively growing supermassive black holes evolve, according to a statement from Ohio State University.

"Quasars are like the baby pictures of a supermassive black hole," Everett McArthur, lead author of the study and a graduate student in astronomy at The Ohio State University, said in the statement. "So exploring how we get from quasars to those black holes is really important."

Quasars are the intensely bright centers of galaxies powered by actively feeding supermassive black holes. Studying these objects can help researchers understand how black holes evolve into the enormous ones found throughout the modern universe. But as these black holes pull in gas and dust, they release so much energy that they can outshine their entire host galaxies, making those galaxies difficult to study.

Rare cases where a quasar acts as a gravitational lens offer a way around that problem, giving astronomers a unique opportunity to observe both the quasar and the distant galaxy whose light is magnified by its gravity.

However, finding these rare alignments can be exceptionally challenging. To uncover them, the research team began with a catalog of roughly 800,000 quasars identified by DESI and used a machine-learning model to search for subtle signatures of gravitational lensing.

Because so few quasars acting as gravitational lenses are known, researchers had little real-world data to train their AI model. Instead, they generated simulated examples of these cosmic alignments, allowing the algorithm to learn what to look for before searching the DESI catalog. The algorithm narrowed the search to about 200 candidates, which researchers then reviewed manually. That process resulted in seven new quasar lens candidates.

The discoveries roughly double the number of known systems found through similar survey searches, according to the statement.

While artificial intelligence played a key role in finding the candidates, the discoveries highlight the scientific potential hidden within the massive datasets produced by modern astronomy. DESI is mapping millions of galaxies and quasars, creating an enormous archive that would be nearly impossible to search by hand.

Follow-up observations will be needed to confirm the newly identified quasar lenses and study their properties in greater detail. If verified, they could offer astronomers a powerful new way to investigate how supermassive black holes shaped the galaxies around them while demonstrating how AI can uncover rare cosmic phenomena hidden within the enormous datasets produced by modern sky surveys.

Their findings were published July 22 in The Astrophysical Journal.

Scientists have found the first triple-lobed asteroid in the asteroid belt between Mars and Jupiter — and it has a small moon to boot.

The asteroid in question is 44 Nysa, which was discovered all the way back in 1857. Of course, back then it was just a pinprick of light in the sky, and subsequent observations — including some from the Hubble Space Telescope — had failed to tell us much about Nysa. Those previous observations suggested Nysa might be bi-lobed, like many asteroids and comets such as asteroid 52246 Donaldjohanson, which NASA's Lucy mission flew past in 2025.

However, new joint observations by the Large Binocular Telescope (LBT) on Mount Graham in Arizona and the Very Large Telescope (VT) on Paranal mountain in Chile have revealed that this asteroid actually seems to have three lobes, the first such object ever seen.

"The images reveal a remarkably unusual object," said lead researcher Kate Minker of Arizona's Lowell Observatory in a statement. "The most likely explanation is that Nysa is either a contact trinary, consisting of three connected components, or an extremely irregular coherent body unlike anything we've previously observed."

Obtaining the detailed images of Nysa was not easy. Key to the success were two high contrast imaging devices, the Italian-built SHARK-VIS on the LBT and SPHERE and its ZIMPOL polarimeter on the VLT, used in conjunction with adaptive optics that counteract the blurring effect of the atmosphere.

"These observations had to be combined with specially developed image-processing techniques to further sharpen the images and remove the bright halo surrounding the asteroid, potentially hiding faint companions," said Anthony Berdeu of the European Southern Observatory.

The images showed an irregular-shaped body 47 miles (75 kilometers) at its widest point, with two notable valleys or "colli" that wrap around the asteroid's circumference and which Minker's team interprets as being the necks of the different lobes. Furthermore, the images revealed a 0.6-mile-wide (1-km-wide) moon orbiting Nysa at a distance of at least 106 miles (170 km). The moon has been designated S/2026 (44) 1 for now. And, because it was seen independently during two different observing campaigns, it was possible to observe its motion around Nysa.

"We borrowed a specialized technique from another field of astronomy, known as high-contrast imaging, to detect the small moon whose faint light was overwhelmed by the intense brightness of the primary asteroid," said Gianluca Li Causi of the SHARK-VIS team at the Italian National Institute for Astrophysics (INAF).

Nysa is named after the mythical land where the ancient Greek god Dionysus was raised by nymphs. Al Conrad of the Large Binocular Telescope Observatory finds the name fitting because Dionysus was the Greek god of theater, which for the ancient Greeks often involved wearing masks and hiding one's true identity.

"We're finally unmasking the asteroid's true nature, long after it was discovered," said Conrad.

How such a bizarre object formed remains uncertain, but Minker's team does have a couple of ideas.

The team's preferred explanation is that Nysa is a contact trinary — three asteroid bodies being held together loosely by gravity. The best alternative, the researchers say, is that Nysa once upon a time had a close encounter with a much larger asteroid that slammed into it, thereby deforming it. In these situations, modeling suggests that gravitational tidal forces could have deformed Nysa's mantle, creating Nysa's odd shape and even ripping it apart into a bunch of fragments in a string-of-peals configuration. If this is the case, then where did the other fragments go? Such events usually produce a family of asteroids all sharing the same composition, but Nysa seems to be alone (barring its moon, of course).

There could be a way to distinguish between the two possible origins. By tracking the moon's orbital velocity and period, astronomers will be able to pin down the exact mass and density of Nysa and then see which model matches it best.

Nysa has been a subject of study because it can also tell us about the birth of our own planet Earth. Nysa is more reflective than many other asteroids thanks to its surface composition that is abundant in a silicate mineral called enstatite, which lacks iron. Asteroids like this are generally called E-types, and Nysa is the largest and brightest of all of them. E-type asteroids are thought to have formed close to the sun and therefore have been identified as potential building blocks of the inner planets. If Nysa is a relic of that time, it could tell us a great deal about conditions in the inner solar system 4.5 billion years ago.

The findings can be read on the arXiv archive, and have been submitted to the journal Astronomy & Astrophysics.

The diets of penguins on Antarctica's Danger Islands can be seen from space. At least indirectly.

Using satellite images captured by the Landsat 8 spacecraft operated by NASA and the United States Geological Survey, scientists can track changes in Adélie penguins' diets based on the color of their guano, or droppings.

What is it?

The image above shows pinkish-orange guano staining large sections of some of the Danger Islands, Heroína Island and Beagle Island. The penguins that live there eat a diet rich in krill, small marine crustaceans that are bright pink in color due to a specific type of algae upon which they feed.

The bright pink color of the penguins' droppings stands out in satellite imagery, allowing researchers to monitor the birds' populations from space. But scientists wanted a closer look, and collected drone imagery as well, as seen in the image below.

Why is it incredible?

It's pretty amazing that the diet of a specific population of birds can be monitored from 438 miles (705 kilometers) above Earth's surface. The imagery collected by Landsat-8 helped scientists locate where the penguin colonies might be, allowing them to find them in-person and collect guano samples. Those samples contained evidence of what the penguins were eating over time.

Researchers are using those satellite images and samples to track how the penguins' diet might be affected by changes in sea ice conditions, according to a NASA statement.

"Sea ice is such a hugely important factor in the Antarctic marine environment," said Clemson University biologist Casey Youngflesh who led a study comparing the penguins' diet and sea ice conditions. "The structure of the region's food web is changing in response."

On July 30, 1610, the famous astronomer Galileo Galilei became the first to observe rings around the planet Saturn.

Shortly after the telescope was invented in 1608, Galileo peered out into the solar system and saw the amazing ring system. At first he didn't actually think they were rings.

Instead, Galileo thought Saturn might have planetary "love handles" that gave it a weird shape. He also wondered if perhaps he was looking at two very large moons on either side of the planet. It wasn't until 1659 that another astronomer named Christiaan Huygens figured out that these weird features were actually Saturn's rings.

Why it mattered

Today, we may take Saturn's rings for granted. After all, it IS known as the "ringed planet" and the jewel of our solar system. But there was a time when we didn't know planets had rings at all, and that's where Galileo's discovery came in.

The telescope was a brand new technology, just two years old, when Galileo took it from a seafaring and distance tool and turned it into an essential item for astronomy. It helped him discover the major moons of Jupiter (we call them the Galilean moons for a reason) and also Saturn's rings. In time, astronomers discovered rings around other large planets in our solar system (Jupiter has them, and Uranus, too), revealing them to be made up of tiny pieces of what may have been torn apart moons.

The study of Saturn's rings has allowed astronomers to see the raw materials of the early solar system. They're made mostly of water ice and shaped by so-called shepherd moons, tiny satellites that orbit Saturn in between ring bands. Saturn's rings even have "kittens," distinct formations scientists are only now starting to understand.

NASA's Pioneer 11 passed through Saturn's ring plane in 1979, with the Voyager 1 and Voyager 2 probes visiting in the 1980s. The Cassini spacecraft was the first to orbit Saturn, ultimately passing through the rings several times in 2017 before ending its mission in a "grand finale" with a crash into Saturn itself.

Want more space history? Check out our full On This Day In Space Story archive and watch our On This Day In Space videos on YouTube.

On Aug. 5, Earth's moon is due for a human-made, high-speed impact from an identified flying object: a spent SpaceX Falcon 9 upper stage. The event will lead to a literal "dust up" on the lunar landscape.

That Falcon 9 upper stage is a leftover from the launch that sent Firefly's Blue Ghost-1 lander to the moon on Jan. 15, 2025. Onboard the same flight was the Hakuto-R Mission 2, called Resilience, a robotic lunar lander developed by the Japanese company ispace.

And according to a new study by an international team published on the open-source arXiv server, the resulting impact plume may briefly be bright enough to see against the dark sky near the moon's edge. That means it might be visible to moongazers with sufficiently sensitive telescopes.

This head-on collision of the errant stage is expected to occur near the Einstein and Bell craters near the western lunar limb. It may well be visible to ground and space-based assets. Indeed, putting aside all the unknowns and modeling uncertainties, some specialists suggest if you've got the time and observational prowess, it might be worth a look.

Visible ejecta spike

Using special physics simulations to model the impact, William Jo, a graduate research assistant at the University of Texas, Austin and colleagues predict the debris plume from the impact will have the central ejecta spike reaching roughly 47 miles to over 60 miles (75 kilometers to 100 kilometers) altitude.

"Our calculations suggest the plume should be several orders of magnitude brighter than the dark-sky background for the first few minutes after impact," Jo told Space.com. "So the plume should be visible, though I'd stress this is a single nominal case. The real one will look different, and the numbers are on the optimistic side. But the point worth making is that the flash isn't really the story here."

Jo emphasized that there's great slam-dunk science to be had. "Watching this one gives us a rare chance to open up ejecta-plume science and calibrate those models against a real event, which matters for every future thing we deliver to the moon," Jo said.

Implications for future moon missions

According to new research led by Benjamin Fernando of the Los Alamos National Laboratory in New Mexico, the impact flash and resultant ejecta plume are "potentially observable" from ground- and space-based observational facilities.

"This event provides an opportunity to attempt the recording of an artificial impact in real-time; although many of the properties of the event (such as visual magnitude) are imprecisely predicted at present," Fernando and colleagues report.

Moreover, this rocket stage meets moon occasion yields an opportunity to test a pipeline for localizing impacts on the lunar surface for future seismic experiments, investigating the dust and plume dynamics from impact events on the moon, and considering hazards from artificial space debris impacts that future astronauts on the lunar surface might have to avoid, Fernando and team members point out.

"The maximum ballistic range of resolved particles is found to be slightly under 1,000 km, which is far enough to be significant from the perspective of presenting a hazard to future astronauts or infrastructure across much of the lunar surface," Fernando et al wrote in the study.

Before and after

Brent Garry is a project scientist for NASA's Lunar Reconnaissance Orbiter (LRO) at Goddard Space Flight Center in Greenbelt, Maryland. LRO will be passing over the projected rocket stage crash site about seven days prior to the impact and about seven days after the impact, Garry explains.

"After the impact we might have a little bit more knowledge of where it is. We can do some additional targeting about a week after the impact and get some targeting over where the site is," said Garry, as noted in earlier Space.com reporting.

Meanwhile, Jo at the University of Texas, Austin underscores the fact that a spent rocket stage is a hollow, spacecraft-like body, and there are very few impact models for human-made objects like it. They seem to produce very different plumes than natural impactors, like asteroids or comets do. But Jo stresses that the real scientific contributions will come by studying the moments after the impact.

"My concern is that most observers will stop at the sub-second flash and never track down the ejecta, which is the part that should actually be visible, and where the science is."

A major space observatory is just one month away from leaving this planet.

NASA scientists got together Wednesday (July 29) to share a status update on the Nancy Grace Roman Space Telescope — the agency's next great observatory that will soon join the ranks of absolute legends like the Hubble Space Telescope and the James Webb Space Telescope.

And that press conference was overflowing with good news. The $4 billion Roman Space Telescope is scheduled to launch on a SpaceX rocket on Aug. 30 at 7:26 a.m. EDT (1126 GMT). That's nine months ahead of schedule according to the team.

"In 30 days, we're going to be launching Roman, testing it out, opening the deployable aperture cover, looking at the sky, and sending data down to the ground for the first time," Jeremy Perkins, Roman's telescope integration and test scientist, said during the press conference at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Wednesday's update comes just days after NASA announced Roman is loaded up with hydrazine fuel, a kind of fuel that's known to be very efficient — though at the cost of being toxic and unstable. For that reason, the agency is looking for ways to move away from this kind of fuel, but it's still used often until a suitable replacement becomes available.

And with Roman, a lot of hydrazine is necessary. This is for a few reasons, as Perkins explained.

First, it's important to know that Roman's headed to what's known as Lagrange Point 2, a gravitationally stable point a million miles away, between Earth and the sun. This is a popular location for observatories because it allows spacecraft to be oriented in such a way that their instruments remain safe from heat while their solar panels can still receive sunlight for power. The James Webb Space Telescope (JWST), for instance, is at L2 as well.

On the way to L2, Roman needs to use some its fuel to course correct and make sure it's headed to the correct destination.

"We do a final orbit insertion around day 100 to get into our final orbit around L2," Perkins said. "After that, we have enough fuel to do all of the momentum dumps and the station keeping maneuvers that we need to do for five years and more."

Now that Roman's fueled up, the next step will be to get it attached to the SpaceX Falcon Heavy rocket that'll carry it beyond our planet.

"Encapsulation, which is when the observatory is installed into the fairing that will carry us to orbit, that happens in three short weeks," Jackie Townsend, Roman's project manager, said during the conference.

Townsend also added that, all in all, the whole Roman team is ready to go: "The Roman dream team continues to do mighty things, and I am delighted to say yet again, Roman is ready for launch."

As for what comes after launch, well, there's one way to put things into perspective.

To compare Roman to the Hubble Space Telescope, consider that scientists expect Roman to produce over 500 terabytes of data per year. In its approximately 35 years of service, Hubble has produced 400 terabytes of data in total.

"Roman has broadly the same sensitivity and sharpness of vision as Hubble, but we survey the sky much faster, so that one month of observations to survey our Milky Way galaxy would take about a century with with Hubble," Julie McEnery, Roman's senior project scientist said during the conference.

"We would need over half a million 4K TVs to fully display the single Roman image from our largest survey," McEnery said. "To understand the scale, these TVs would cover 45 Manhattan city blocks."

What about comparing Roman to the JWST? While the Roman Space Telescope does have some near-infrared capabilities, thanks to its impressive Wide-Field Instrument (WFI). However, it doesn't quite stack up to the JWST's ultrasensitive infrared sensors. Where it does have an advantage, though, is when it comes to its panoramic view. A Roman image would be about 50 times wider.

"Webb is designed to be able to probe very deeply and with exquisite sensitivity into the universe so we can find rare things in the early universe," McEnery said of the JWST. "But you need Roman to find rare things in the more nearby universe."

As an example, McEnery pointed out the "little red dots," elusive objects that seem to repeatedly appear in JWST images of the ancient universe. The key to understanding what these objects are is to find as many as possible. However, with the JWST's extremely zoomed in images focused on the deep, deep universe, it can't exactly map that many at once. But Roman is built to do just that.

Once all this data is in hand, the possibilities for what we may find are endless. One of Roman's instruments called a coronagraph is expected to revolutionize exoplanet research while WFI scans the cosmos to image around 2 billion galaxies during the telescope's main survey.

"I think of this as doing magic with physics. We're taking advantage of the wave properties of light to cancel out the light from a star, so that we can image planets next to it," McEnery said.

Understanding the dynamics of as many galaxies as possible will help scientists decode the intricacies of dark matter and dark energy. We can't see the dark universe, but we can see how it affects its observable counterpart. And these are just a few of the expected outcomes of Roman's survey. As the team has continuously suggested — in fact, as most observatory teams tend to suggest — the best discoveries will be the surprises.

Even when you think about other technological advances, the principle holds true. When the internet was first invented, its inventors probably didn't expect it to lead to innovations like Facebook or Spotify and when the first video game was invented, the concept of an open world RPG maybe seemed beyond our means.

"When we built Hubble and Webb, we were chasing far off galaxies in the farthest corners of the universe. But because we have a Hubble and Webb, we're able to track asteroids that would pose a threat to Earth or to future lunar outposts on on the lunar surface," Shawn Domagal-Goldman, director of the astrophysics division at NASA Headquarters said during the conference. "Those were impossibilities that are now just possible and sometimes routine."

Perhaps whatever Roman has in store for us will lead to the next generation of its namesake, Townsend pondered.

Roman is named after Nancy Grace Roman, a pioneer in her field who was the first female executive at NASA as well as the agency's first chief of astronomy. She's sometimes called the "mother of Hubble" because of her major contributions to the telescope and is famous for breaking ground in research about satellites. She also helped form the foundation for exoplanet science decades before the first exoplanet discovery.

"The next Dr. Nancy Grace Roman, sitting in a classroom somewhere next year, will be studying our data and hopefully catch the science bug and go on to transform the world in the same way that Dr. Nancy Grace Roman did," Townsend said.

"I could not be prouder to be part of this project."

Using NASA's Chandra X-ray space telescope, astronomers have spotted the blisteringly hot exhaust fumes of one the earliest quasars, cosmic "breath" with temperatures as great as 36 million degrees Fahrenheit. This intensely bright titan is powered by a feeding supermassive black hole engine.

The Chandra X-ray telescope observed a relatively silent quasar that existed 2.1 billion years after the Big Bang. The cosmic "exhaust fumes" from this black hole engines extend out for around 100,000 light-years around a quasar at the heart of a still-forming galactic cluster, or "proto-cluster" called MQN01. These blisteringly hot gas structures will eventually become the atmospheres that envelope modern clusters of galaxies, known as the intracluster medium (ICM).

Thus, this research reveals for the first time the exact moment in cosmic history that these galactic atmospheres began to form and gather.

"The central scientific question is to understand how this hot phase forms: what are the physical conditions of the gas during its formation and what processes contribute to its heating," team member Sebastiano Cantalupo of the University of Milan-Bicocca said in a statement.

"[The data] show extraordinary properties of the gas that could provide us with the first insights into how this hot phase of the circumgalactic medium, which we now see as intracluster medium, formed."

Start your engines...

The team behind this research spotted this hot gas structure after 180 hours of X-ray observations conducted by Chandra. Until now, X-ray detections such as this have only been made for quasars that sit in active galactic nuclei (AGNs) at the heart of "radio-loud" galaxies.

The X-ray emissions from these radio galaxies come from jets of particles blasted out from around feeding supermassive black holes at near-light speeds.

But the quasar at the heart of MQN01 differs from these because it is radio-quiet. This means the X-rays detected by Chandra from this quasar are uncontaminated by plasma jets, so the observation is entirely the result of the cosmic "motorbreath" from the quasar.

"We are facing one of the most distant detections of extended thermal X-ray emission associated with the formation of hot gas in dense regions of the universe, which will likely evolve into the known local ICM," Cantalupo said.

"We believe we have identified a phase in its life in which cold gas falls towards the gravitational potential of this massive halo and is heated by gravitational shocks, reaching temperatures of about 20 million Kelvin [36 million degrees Fahrenheit (20 million degrees Celsius)].

"The densities and pressures we measured are high: one to two orders of magnitude higher than those of clusters in our local universe."

The observations of this radio-quiet galaxy were possible thanks to the application of a technique usually used to analyze Seyfert galaxies, which host feeding supermassive black holes in the local universe (the area of space found within 1 billion light-years of Earth). The challenge the team faced was isolating the faint light from the gas from the blinding glare of gas closer to the central black hole.

"We were initially extremely skeptical ourselves," team leader Andrea Travascio of the INAF said. "Given the exceptional nature of the data, we sifted through every alternative explanation: from artificial outflows to instrumental contamination or other unsuspected effects. But each alternative scenario encountered insurmountable theoretical limitations. The thermal explanation is the only one consistent with the physical data."

Travascio and the team are now analyzing archival datasets from hundreds of other quasars to discover if this heating phase is common to protoclusters or if MQN01 is a rarity.

"Considering how unique the result was and also taking into account Chandra's technical difficulties in the final phases of its mission, the satellite has once again demonstrated its extraordinary ability to produce scientifically relevant results even after decades of operation," Travascio said.

The team's research was published on Friday (July 24) in the journal Astronomy & Astrophysics.

NASA announced on Tuesday (July 28) that it has officially fueled-up the Roman Space Telescope — a magnificent new observatory expected to generate over 500 terabytes of cosmic data per year. By comparison, the Hubble Space Telescope, in its 35 years of service, has created over 400 terabytes in total.

At present, the Roman Space Telescope's launch aboard a SpaceX Falcon Heavy rocket is scheduled to occur on Aug. 30 at 7:26 a.m. EDT (1126 GMT). And considering the project is sort of the gold-standard for telescope-building, as the team says it's nine months ahead of schedule and under budget, hopes are high that this launch date will stick.

Fueling of the observatory took place on Saturday (July 25) and involved pumping it up with what's known as hydrazine fuel. Hydrazine fuel is a classic sort of fuel used in NASA spacecraft as it's highly efficient; however, because its extremely toxic and unstable, there have been attempts to move away from this sort of fuel and replace it with something less hazardous.

The Roman Space Telescope's inauguration into NASA's fleet of observatories will mark a pretty big moment for the advancement of astronomy.

Roman's specs are quite impressive; thanks to that showy data-generation figure discussed above, the telescope is expected to further our knowledge of intriguing phenomena like dark matter, dark energy, supernova explosions and even the hunt for habitable exoplanets.

It will work as a complement to other major telescopes, including the James Webb Space Telescope (JWST). For example, while Roman can't see as far as the JWST, it does have the same sort of infrared vision that enables such deep space probing. What it can do that the JWST cannot, though, is see a much wider swath of space at once.

One of Roman's instruments, named Wide Field Instrument (WFI), will be able to create images of the infrared universe 50 times wider than the JWST's images. This means that while the JWST is zooming in on a particular object of interest, Roman could meanwhile be compiling future targets for the JWST or catching anything fleeting that the JWST would've missed due to its highly narrow view.

As another example, to help with dark universe studies, this ultra-wide view should allow Roman to study lots of galaxy movements at once. That's great because the only way we even know dark matter and dark energy exist (aka one of the best ways we have of studying the two) is by the way they affect galaxy movements.

"So we're going to see thousands of supernovae, and some of these are going to be further away than any supernovae we've ever seen before," Dominic Benford, program scientist for the Nancy Grace Roman Telescope previously told Space.com.

To accomplish all of these goals though, Roman will have to use its new fuel supply to get to its designated station in space: Lagrange point 2. This is a sought-after spot for spacecraft as it's a gravitationally stable point about a million miles from Earth. That stability means spacecraft have to use less fuel to stay put.

"Roman will use its propellant to power two types of thrusters that help it stay in its planned orbit around L2 and ensure the solar array panels face the sun, which is the observatory's main source of power throughout the mission," NASA explained in a statement.

It's where the JWST is right now — if all goes to plan, we'll really have a nice tag-team operation happening over there.

The Milky Way's spiral disk may have flipped over by 90 degrees, in turn altering the solar system's orbit around the center of the galaxy.

Spiral galaxies such as the Milky Way have two main, visible, structural components: a disk that encapsulates most of its stars, gas and the central black hole, and a more diffuse halo of older stars that encapsulates the disk.

However, the Milky Way's stellar halo has always been a bit of an oddity. The European Space Agency's Gaia mission measured the motion of the halo's stars to find they rotate slowly compared to other material within the spiral disk. Now, supercomputer models led by Kirill Batrakov of the University of Durham have found what triggers this: galactic mergers and spiral disks becoming flipped over.

In their simulations, Batrakov and colleagues tracked the evolution of 25 Milky-Way-like galaxies across billions of years. They found that those which had slowly spinning haloes also experienced head-on mergers with other galaxies and had their disk flipped at some point.

"We already know that the Milky Way had a massive head-on collision in the past with a galaxy known as Gaia-Sausage-Enceladus," Batrakov said in a statement. "So, we think that the Milky Way disk likely flipped in the past."

Gaia-Sausage-Enceladus was a dwarf galaxy with more than 10 billion times the mass of our sun that slammed into the Milky Way between 8 billion and 11 billion years ago. The evidence for this collision was also found in Gaia's measurements of the motions of stars. The colliding galaxy's strange name comes in part because as it was ripped to pieces by the Milky Way's gravity, its stars were channeled onto highly elongated, sausage-shaped streams that our galaxy incorporated into its halo.

This collision was the last major impact that our Milky Way galaxy experienced, but maybe not the last major event that it experienced. At some point, the Milky Way's disk seems to have also flipped, but what caused this is uncertain. Also of note: The simulations showed that galaxies whose disks flipped hadn't always experienced a merger.

"We think that there might possibly be different mechanisms driving the disk flips," Batrakov told Space.com. "At this point, we are not sure which scenario applies to the Milky Way specifically and a further investigation is needed on the precise mechanics of disk flips."

These two mechanisms — the merger and the flip — would both contribute to the slower spinning halo. The head-on merger sees lots of stars from the Gaia-Sausage-Enceladus galaxy get thrown into the halo but on trajectories strongly misaligned with the disk. So, relative to the disk, they collectively rotate more slowly.

The disk flip leads to a similar situation. In the simulations, the flip is measured with respect to the space around the galaxy, but as the orientation of the disk changes relative to the halo, the halo doesn't immediately reorient with it and takes its time to synchronize its rotation with the disk. Hence, this misalignment results in the halo having less coherent rotation relative to the new orientation of the disk.

If the disk flip occurred during the solar system's lifetime, then it could have impacted our own orbit around the galactic center.

"A disk flip means that most of the Milky Way's stars once moved on very different trajectories than they do today, possibly even our sun, meaning our 'stable' spot in the galaxy might not have been so stable for the solar system's whole lifetime," said Batrakov.

Much of what we understand about other galaxies comes from our knowledge of the Milky Way and its story.

"Finding that its disk flipped adds a new chapter to that story, one we must account for when placing the Milky Way in a broader context of other galaxies," said Batrakov, who recognizes just how incredible it is that we can infer this story through careful observations billions of years after the fact.

"What excites me most is that this complex history can be reconstructed just from present-day observations," he said.

Batrakov presented his work at the Royal Astronomical Society's National Astronomy Meeting, being held at the University of Birmingham between July 20 and July 24.

China's Chang'e-8 moon lander mission scheduled for 2029 could send Africa's first space exploration mission to the lunar south pole.

Under the Africa2Moon venture, the Bounced African Low Lunar Sphere, or BALLS for short, is a technology demonstrator in which a trio of spherical probes on the lunar surface will form a radio astronomy array at the moon's south pole region. Each of the metal spheres contains low-frequency radio telescope antennas that will search for signals from some of the oldest and most distant parts of the universe.

Astronomers say the lunar far side is the most radio-quiet site in Earth's vicinity, a location perfect for "listening" to the universe without interference. The BALLS array will work together to observe low frequency radio signals from space that are not observable from the surface of the Earth, according to Carla Mitchell, mission director of the Africa2Moon initiative and Africa Program manager at the South African Radio Astronomy Observatory (SARAO). The moon is an ideal place to perform such studies, they said, as the low frequency signals to be measured are unobservable from Earth due to interference created by our planet's atmosphere.

Pathfinder

The Africa2Moon project was selected by the Chinese National Space Administration in April 2025 as one of nearly a dozen of Chang'e-8's international payloads.

BALLS will enable observations below 20 megahertz (MHz) that are inaccessible from Earth due to ionospheric distortion and radio interference. Low-frequency radio waves (below about 50 MHz) come from some of the oldest and most distant parts of the universe.

The BALLS array will serve as pathfinder hardware for future lunar technologies and radio astronomy experiments. They will also act as a technology demonstrator for the full Africa2Moon mission, which plans for an array of 55 antennas to be deployed on the far side of the moon.

From paperwork to hardware

"As a little girl I thought space was not possible for people in Africa. I never thought I would be here today, presenting our lunar mission at NASA," said Mitchell.

Mitchell detailed years of team work on the BALLS initiative, rolling forward from paperwork to hardware, speaking July 22 at the NASA Exploration Science Forum 2026, held at NASA's Ames Research Center and staged by the NASA Solar System Exploration Research Virtual Institute (SSERVI).

SARAO is the national radio astronomy facility of South Africa, operating and managing such facilities as MeerKAT and the South African Square Kilometer Array (SKA) project. SARAO is involved in a range of cosmic inquiries, from pulsar research to studying fast radio bursts, dark matter and dark energy.

Spaced out

Once deployed on the moon, the BALLS trio would be spaced out on the lunar surface. Signals captured from the BALLS array are to be communicated to the Chinese lander and then relayed back to Earth for further processing.

Each of the BALLS consists of a spherical gyroscope-like frame made of interlocking rings, encasing two large triangular solar panel arrays with a grid-like surface texture. The panels are oriented in opposite directions — one pointing upward and one downward — giving the structure a tetrahedron-like inner form.

The mission is led by the Foundation for Space Development Africa in collaboration with SARAO, the South African National Space Agency, the National Institute for Theoretical and Computational Sciences, as well as institutions in Kenya, Ghana, Botswana and across the continent.

Teams at Petrawell in Cape Town, Aerospace Systems Research Institute at the University of KwaZulu-Natal and Electronic Systems Laboratory at Stellenbosch University were involved in manufacturing the components of the structural and functional BALLS models. They were assembled in April 2026, to be delivered to China's Chang'e-8 team for testing.

"The power of collaboration, education and hope cannot be underestimated for Africa's future in space science and technology," she said.

Looking to a second mission

As for the full Africa2Moon mission consisting of 55 antennas emplaced on the far side of the moon, Mitchell said they would require a launch as with the first mission.

"So yes, it would probably be contingent on China partnering again with us," Mitchell told Space.com.

The design of the second mission instruments would be a little different too.

"We would want to have them a little larger in diameter and so they would have to go in a flat version that will deploy into a ball versus the current version that travels as a ball, due to space constraints," Mitchell said.

"The deployment onto the lunar surface would also be different, as in self-deploying from the lander as opposed to a robot deployment. This would enable a faster and more random and further dispersed deployment pattern, which enhances the science," she said.

Shoe-string budget

"I am amazed that it is being done on a shoe-string budget by volunteers. This demonstrates the inspiration of space and if this is successful, it will ignite the reality of space on the African continent," said Clive Neal, a lunar science exploration specialist and professor in civil and environmental engineering and Earth sciences at the University of Notre Dame.

Attending Mitchell's talk at the recent forum at Ames Research Center, Neal said the broader lunar exploration community is willing to help if needed.

"Her talk was inspirational," Neal said, "especially as the broader planetary science community over here [in the U.S.] is moaning about the lack of funding!"

Astronomers have used the Very Large Telescope (VLT) in the Atacama Desert region of Northern Chile to discover the strongest evidence yet that the famous star Betelgeuse has a companion star. That means after a century of investigation, scientists are closer than ever before to conclusively identifying Betelgeuse as a binary system composed of two stars, Betelgeuse A and Betelgeuse B.

Betelgeuse is a red colored star visible with the naked eye in the constellation of Orion and located around 650 light-years from Earth. Astronomers initially proposed the existence of another star orbiting Betelgeuse around 100 years ago in an attempt to explain the familiar star's strange dimming, which has been observed for over 1,000 years. While other teams have gathered evidence of the existence of Betelgeuse B, this new image is the clearest ever direct observation of the star. The scientists behind the discovery are thrilled.

"This is the conclusion of a century-long quest," team leader Miguel Montargès of the Observatoire de Paris, France, said in a statement. "We have shown that Betelgeuse is not single; it is accompanied by a faint stellar companion. I jumped from my chair when I saw the processed images."

The discovery of this new evidence of Betelgeuse B follows two papers published in 2024 that suggested this elusive stellar companion would be at its furthest from Betelgeuse A in December of that year. With that clue in hand, Montargès and colleagues set about hunting it.

"Honestly, I thought we did not have the sensitivity to detect Betelgeuse B as it was predicted," Montargès said. "Because it is more massive than predicted, we see it!"

Betelgeuse B had previously been theorized to be around the same mass as the sun, but these new observations reveal that this elusive star has instead around two to three times the mass of our star.

"The fact that we can still discover a nearby companion, more massive and brighter than the sun, around such a well-studied star is remarkable," Montargès added. "These are among the best moments in science: seeing something new, unexpected."

Capturing Betelegeuse B was only possible thanks to the VLT's SPHERE instrument, which features a coronagraph that blocks out the light of a planetary system's star. Combined with the advanced optics on the instrument, this allows scientists to measure the wavelength and polarity of light both coming directly from the star and being reflected off of any nearby planets. But that's not all SPHERE can do.

"It is remarkable to see how SPHERE and advanced post-processing techniques, originally developed to find exoplanets, also excel at detecting a companion around a massive, evolved star like Betelgeuse," team member Anthony Boccaletti, also an astronomer at the Observatoire de Paris, said.

There are still many questions to answer regarding Betelgeuse B. The team still needs to solidly confirm that what they have seen is actually a companion star, and they would also like to know how the presence of this star could shape the future of Betelgeuse A.

This red supergiant star nearing the end of its evolution gained notoriety a few years ago when its sudden and rapid brightening led to speculation it was about to suffer an explosive death.

"To be certain that the companion is really there, we still need to observe it in one year on the other side of the star, but there is very little space left for doubt," Montargès said. "The question is truly open whether this companion is going to have an impact on the evolution of the red supergiant."

The team's research was published on Tuesday (July 28) in the journal Astronomy & Astrophysics.

Radio telescopes are designed to listen for signals from the stars and from distant galaxies, but scientists are also pointing out that these instruments can also track objects somewhat closer to home: junk in Earth's orbit.

Engineers have used the famed radio telescope at Jodrell Bank in the U.K. as part of an international plan to watch high-altitude space debris. Normally, old satellites and bits of spacecraft stuck up in geostationary orbit are too high up for our normal ways of watching space debris. However, said international project, called Long Baseline Multistatic Radar (LBMR), successfully used a radio telescope to get around this problem.

"That's the first time that's ever been done," Simon Garrington, associate director of Jodrell Bank, said in a video about the project.

A pressing problem

It's hardly a secret that junk is rapidly piling up in Earth's orbit — dead satellites, rocket remnants, rubble from satellite collisions or anti-satellite missile tests, and more. And as we keep filling Earth's orbit with thousands more satellites each year, we're also increasing the risk that one is struck by a debris fragment. We need to track this debris.

Most satellites exist in low Earth orbit (LEO) below altitudes of 1,250 miles (2000 kilometers), and indeed space debris is more concentrated at LEO. Still, there’s good reason to be just as concerned about debris in the much higher geostationary orbit (GEO), which falls 22,500 miles (36,000 kilometers) in altitude. Crucial communications and weather satellites lie in GEO, for instance, and space debris doesn't need to come in great quantities to pose a threat — just one unfortunate strike can cripple a satellite.

This leaves debris-hawks with a conundrum. They typically track space junk in LEO with radar, but most ground-based radar systems aren't sensitive enough to watch GEO's heights. Instead, they rely on optical telescopes to see objects in GEO. These telescopes are good for tracking larger objects (larger than about 4 inches, or 10 centimeters, across), but they can't resolve smaller objects as well as radar can. Yet these smaller objects can be just as deadly and destructive as their larger counterparts. If we want to see them with radar, we'll need especially sensitive receivers.

Fortunately, that equipment already exists, too — that's where radio telescopes can help.

Engineers have tried debris-watching with radio telescopes as early as the 1990s, but LBMR, backed by NATO and the U.K. Space Agency, wanted to go further and watch debris in real time.

LBMR's engineers drew up a scheme to make this work. They would broadcast radio waves with a radar installation at the Massachusetts Institute of Technology's Lincoln Laboratory in the U.S. These radio waves would glance off debris and fall back into the dishes of U.K. radio telescopes such as the Lovell Telescope at Jodrell Bank. Back on the ground, the radio telescope's signal would be processed and analyzed in real time.

Aligning a radar transmitter with a radio telescope on the far side of an ocean, then processing its signals, is far easier said than done.

"This idea started about seven years ago. It sounded at that time like a crazy idea, because we had no synchronization. We had assets on one end of the ocean and other assets on the other end of the ocean," said Marco Martorella, an electronic engineer at the University of Birmingham and another member of LBMR, in a video. "But we were crazy enough to continue."

This required years of work, but the researchers have now successfully demonstrated that they can receive a signal with a single antenna. This has allowed them to track the distance to a piece of debris, and how quickly that distance is changing, in real time.

Next, the LBMR researchers hope to demonstrate that they can receive radar reflections of the same object with multiple radio telescopes at once. This, the researchers say, would allow debris-hawks to use the radio telescope technique to truly track debris in three dimensions.

Using the Chandra X-ray spacecraft, astronomers have seen a supermassive black hole jet churning and "cooking" gas surrounding a galaxy nicknamed the "red potato." And this potato is seen as it was when the universe was around 2 billion years old.

The galaxy in question is officially designated MQN01 J004131.9-493704 and is located about 11.7 billion light-years from Earth at the intersection of a vast cosmic web along which galaxies formed in the early universe. Originally discovered by the James Webb Space Telescope (JWST), the odd, blob-like appearance of the galaxy is why it has such a peculiar nickname.

The red potato sits in a cosmic "pot" of cold and dense gas. This is a little puzzling, as this should mean that stars are actively forming around it, but that isn't happening. New research offers an explanation: a supermassive black hole in the vicinity of the red potato is churning and heating the galaxy's pot of gas. This could be preventing the gas from cooling and collapsing to birth stellar bodies.

“Stars are not forming like we thought they would, so we went searching for the reason why," team leader Weichen Wang of the University of Milan-Bicocca in Italy said in a statement. "We found there may be a cook in this cosmic kitchen."

An unexpected chef

A supermassive black hole's interference with the red potato was first indicated by the fact that its surrounding gas is unexpectedly turbulent in comparison to similar gas clouds around similar galaxies.

Wang and colleagues set about hunting for the source of this turbulence with Chandra. That's when they found a black hole jet pointed toward the red potato, which they reasoned must be slamming into this ancient galaxy's gas envelope.

"If the black hole's jet is stirring up the gas around the red potato, it could greatly slow down how quickly the galaxy can acquire new, fresh material to form stars," team member Sebastiano Cantalupo of the University of Milan-Bicocca said in the statement. "With the energy from the stirring, the galaxy will starve and not be able to produce new stars at the rate expected for similar galaxies at the same cosmic epoch."

The meddling supermassive black hole is located in a galaxy around 200,000 light-years from the red potato, and this galaxy is actually very actively forming new stars. Indeed, other galaxies in the vicinity of the Red Potato are also birthing new stars.

This discovery, as part of some of the first research to investigate the behavior of gas around non-star-forming galaxies, could be vital in improving our understanding of how neighboring galaxies interact and, occasionally, interfere with each other's evolution.

"The red potato is leaving crumbs of information that may help us track down the answers to some really big questions," team member Andrea Travascio, also of the University of Milan-Bicocca, said. "Quite an important job for a galactic spud like this."

The team's research was published on July 7 in the journal Astronomy & Astrophysics.

NEW YORK — Madison Square Park in midtown Manhattan is home to some 44 tree species. And on a Thursday afternoon blanketed in wildfire smoke, a small crowd gathered to see one in particular. The slender American sweet gum looked unassuming, especially compared to the enormous English elm neighboring it. But this tree had a secret: it had traveled 1.3 million miles before landing in New York.

The sapling was germinated from one of 1,000 seeds NASA sent aboard the uncrewed Artemis I mission, which saw a space capsule orbit the moon in 2022. Just a few years later, the same kind of capsule would take the famous Artemis II crewmembers on the same journey. Hundreds of these "moon trees" have been planted across the U.S. in the last two years as the space agency drums up excitement for future Artemis missions, which aim to return humans — and not just seeds — to the lunar surface by 2028.

Steph Lucas, director of horticulture for the Madison Square Park Conservancy, applied with NASA for a moon tree seedling in 2023. The request was finally granted in 2025. "We were so thrilled," Lucas told Space.com. The tree grew quietly for a year before the conservancy unveiled its presence with a "birthday party" extravaganza on Thursday (July 16).

Madison Square Park's moon tree is part of a legacy spanning back to NASA's original lunar program. In 1971, astronaut Stuart "Smoky" Roosa brought about 500 seeds aboard the Apollo 14 moon mission. These seeds later grew into saplings that NASA distributed to parks, arboretums and historic sites across the globe. A seed from one of these first-generation moon trees even attended the new tree's birthday party.

The event also featured a celestial-themed garden, poetry reading, a gallery of children's artwork, launch-able foam rockets and, of course, birthday cake — enough for about 100 people.

However, the party had fewer guests than expected. A thick plume of smoke from wildfires raging in Canada blew southward and tinted the sky above New York orange. The air quality plummeted, and many people chose to remain indoors for their health. Some of those who did turn up wore KN95 masks.

In a strange way, the atmosphere was fitting. The specter of climate change hung heavy over the city, and it was very much on Lucas' mind as she was vying for the conservancy's moon tree selection. NASA offered five different species of moon tree: Douglas fir, Loblolly pine, Sequoia, London plane and American sweet gum. Lucas requested an American sweet gum over a more cold-hardy London plane tree, even though its current range falls slightly south of New York City. Sweet gums are well-adapted to wet, temperate conditions, and as the climate warms in the coming decades they will likely feel right at home in Manhattan. "We think that this will be a better selection as the future goes on," said Lucas.

Stuart Roosa himself was a former smokejumper for the US Forest Service, a job that involves dropping from a helicopter into the heart of an active wildfire to fight it. He agreed to bring along those first moon seeds as a love letter to future generations on Earth. That's the spirit the Madison Square Park Conservancy hopes to channel.

"Space inspires us, right? And plants can be inspiring too," Lucas said. After a year of growth, the park's moon tree is now firmly rooted and standing tall without supports. Gazing at it through the wildfire haze, Lucas mentioned that the young tree seems by all accounts to be thriving. Its progress, she said, brings her hope. "We can always work towards a better future."

Fixing a problem inside one of the world's most sophisticated scientific observatories might seem like the kind of challenge that demands a multimillion-dollar upgrade or revolutionary new technology.

But for scientists working on the Laser Interferometer Gravitational-Wave Observatory (LIGO), which listens for ripples in spacetime generated by cosmic collisions like merging black holes, the solution to a mild but persistent engineering challenge turns out to be as simple as an off-the-shelf camera.

By pairing commercially available thermal imaging cameras with computer models, a team led by Jonathan Richardson at the University of California, Riverside, has developed a technique that corrects tiny, heat-induced distortions in the observatory's mirrors — an elusive flaw that scientists say currently limits how far into deep space the facility can look.

"It doesn't require any new technology development, which is almost unheard of for solving a LIGO instrumentation problem," Richardson said in a statement.

Once incorporated into LIGO's upcoming upgrade, Richardson and his team estimate the fix would extend the observatory's reach by roughly 33 million light-years.

That gain might sound like a drop in the ocean against the unimaginably vast scale of the universe, but because space expands in three dimensions, pushing a detector's reach even slightly opens up an exponentially larger window of space. Being able to look further into the universe will allow astronomers to "hear" many more cosmic ripples, in turn increasing the potential for discovering the universe’s most violent collisions that lie beyond LIGO's reach today.

LIGO detects these cosmic ripples, known as gravitational waves, using twin L-shaped facilities in the U.S. — in the states of Washington and Louisiana. Inside each detector, a laser beam shoots down two 2.5-mile-long (4-kilometer-long) tunnels, bouncing off pristine mirrors at each end. When a gravitational wave passes through Earth, it subtly stretches one tunnel and squeezes the other. That microscopic shift alters the laser beams ever so slightly, producing a tiny flicker of light that alerts scientists to a distant cosmic event.

Because these cosmic signals are inconceivably small, preserving every single photon is crucial. To accomplish this, LIGO relies on mirrors polished to reflect 99.9999%t of the laser light that strikes them, ranking them among the purest optical components ever built.

Yet even these near-perfect mirrors have had one unavoidable flaw. The mirrors still absorb a tiny fraction of that intense laser light. That energy turns into heat, warping the mirror's surface by just a few nanometers, enough to distort the laser beam and reduce the observatory's overall sensitivity.

Physicists already knew they could counteract these distortions by applying targeted heat to the back of the mirrors. The difficult part was measuring the distortions accurately enough such that the correcting heat could be applied with exact precision.

The new technique uses infrared thermal images and existing computer models to reconstruct a map of distortions across the mirror's surface.

"You can think of it like taking an infrared picture of a car engine," Richardson said in the statement. "An engineer can look at the temperature pattern on the outside and infer what's happening inside the engine. We're doing the same thing with LIGO's mirrors."

And the technique isn't just a fix for LIGO. It is also expected to become part of the foundational design for Cosmic Explorer, a proposed next-generation U.S. gravitational-wave observatory targeted for the mid-2030s.

With 25-mile-long (40-km-long) arms — 10 times larger than LIGO's — Cosmic Explorer is already designed to detect gravitational wave events far beyond the reach of today's observatories. This new technique will only supercharge its ultimate reach.

"The goal for the next generation of gravitational-wave detectors is to achieve about 10 times the sensitivity of today's instruments," Richardson said in the statement. "One of the key obstacles to achieving that is reducing the fundamental quantum mechanical noise that limits the precision of the measurements."

The technique is described in a paper published July 16 in Classical and Quantum Gravity.

Scientists have measured temperatures beneath the surface of Jupiter's volcanic moon Io, offering the first-ever glimpse of the hidden heat driving the most volcanically active world in the solar system.

During close flybys of Io in late 2023 and early 2024, NASA's Juno spacecraft turned its Microwave Radiometer (MWR) instrument toward the moon, probing roughly six to 20 feet (two to six meters) beneath its surface. Originally designed to peer through Jupiter's thick clouds, the instrument instead revealed a powerful new way to study how heat moves through planetary crusts, according to a statement from the space agency.

"The surprising discovery that we could see below a rocky moon's surface has important implications for studying Earth's volcanoes," Scott Bolton, coauthor of the study and Juno's principal investigator, said in the statement. "Juno has taught us that if we look with an MWR-type instrument near a volcano on Earth, we might see a similar signature in the subsurface temperature gradient, providing new information on how terrestrial volcanoes work."

Until now, researchers had relied almost entirely on infrared observations, which detect only the temperature of Io's surface. By probing several feet underground, Juno has revealed how heat moves through the moon's crust for the first time.

The measurements showed temperatures rising by more than 40 degrees Fahrenheit (22 degrees Celsius) just a few feet below the surface — far more than sunlight alone could explain. Juno's subsurface heat map also revealed localized regions of elevated heat, with temperatures measuring between 18 and 36 degrees F (10 to 20 degrees C) warmer than the surrounding terrain, according to the statement.

Juno's observations uncovered another surprise, too. Despite being known for its towering mountains and active volcanoes, much of Io's surface appears remarkably smooth and composed of unusually low-density material. Researchers think the moon is blanketed by porous layers of volcanic ash, sulfur frost and other eruptive debris that continually resurface Io, burying older terrain beneath fresh deposits.

Scientists think the heat detected beneath Io's surface could be rising steadily from the moon's molten interior through a conductive crust or coming from pockets of cooling lava flows trapped just below the surface. Either way, the data provide the clearest picture yet of how Io transports heat from its interior.

Unlike Earth, where volcanism is driven largely by heat from radioactive decay, Io is continuously stretched and squeezed by Jupiter's immense gravity as it orbits the giant planet. This constant tidal flexing generates enormous amounts of internal heat, fueling hundreds of active volcanoes and making Io the most volcanically active object in the solar system. By improving scientists' understanding of how heat and magma move beneath a planet's surface before eruptions, the same microwave techniques used by Juno could one day help researchers better monitor Earth's volcanoes and improve eruption forecasting.

"Io provides a unique window into learning how tidal heating works throughout the cosmos, a fundamental process that provides energy and heat to worlds that are far from their parent star," Bolton said in the statement. "This process can not only create the most volcanic body in the solar system, in the case of Io, but also fuels the subsurface oceans on the moons of giant planets, such as Europa and Ganymede. Up until this point we could only observe the heat escaping at the surface or through eruptions. Now we can characterize how the heat is moving from the interior toward the surface."

Because Io is an extreme example of volcanic activity, it serves as a natural laboratory for studying how heat moves through planetary crusts. Those insights could help scientists better understand ancient volcanism on Mars, Venus, and Earth's moon, whose landscapes were shaped by massive eruptions billions of years ago.

The technique could also aid the search for life elsewhere. While Io itself is far too hostile to support life, microwave instruments can also probe beneath icy surfaces. Juno has already used the same instrument to study Jupiter's moons Europa and Ganymede, where scientists believe vast oceans lie hidden beneath thick shells of ice. Understanding how heat moves through those crusts is key to determining whether they could harbor environments suitable for life as we know it.

Their findings were published July 22 in the Journal of Geophysical Research: Planets.

Hey, Space Fans! Every weekend here at Space.com, you may have noticed we highlight the latest episode of the podcast This Week In Space, a TWiT show co-hosted by yours truly and my friend and colleague Rod Pyle, a space historian and editor of the National Space Society magazine Ad Astra.

This Week In Space episodes usually drop each Saturday, but this week we're doing something a bit different. To mark the 50th anniversary of NASA's Viking landings (Viking 1 touched down on Mars on July 20, 1976), Rod and I will host a special live taping of the podcast to discuss all things Martian starting at 1:30 p.m. EDT (1730 GMT). It should last up to 90 minutes.

Joining us on the podcast will be:

• Dr. Pascal Lee, a planetary scientist, geologist and artist with the SETI Institute, Mars Institute and NASA Ames Research Center.
• Dr. Penny Boston, an astrobiologist and speleologist (the study of caves) with the New Mexico Institute of Mining and Technology.

During our discussion, we'll touch on the personal and scientific impacts of NASA's Viking Mars landings and look at where Mars exploration may go in the modern age. We might even discuss the best places for the hunt for signs of life: the surface or inside Martian caves?

So if you're a Mars fan or a casual space aficionado, join us today at 1:30 p.m. EDT to get a detailed look at NASA's Viking Mars landings and their lasting impact on Martian exploration.

Using NASA's long-serving Hubble Space Telescope, astronomers have discovered that a stellar explosion in the Milky Way is blasting out cosmic bullets travelling at 20 million miles per hour.

The cosmic explosion in question is V445 Puppis, which erupted in 2000 and is the only known "helium nova" in our galaxy. Though astronomers have been studying V445 Puppis for two decades, much of the phenomena associated with it were shrouded in mystery due to a vast cloud of dusty debris that surrounded this nova.

When this debris finally cleared, a team of researchers was able to peer into V445 Puppis using Hubble, NASA's exoplanet-hunting spacecraft TESS (Transiting Exoplanet Survey Satellite), and the Earth-based Very Large Telescope (VLT), along with an array of other instruments. This allowed them to discover not only the "bullets", clumps of potentially oxygen-rich gas it is firing, but also the true nature of this system. This revealed that V445 Puppis consists of a dead star hungrily feeding on a companion star that is, by itself, a rare find. Thus, this system offers scientists a rare chance to study one of the rarest types of binary systems and one of the rarest cosmic explosions.

"The origin of these 'bullets' is a mystery. We suspect that these originated post-outburst, but 'bullets' of this kind have not been observed in any other nova," team member John Mills, a researcher at the University of Warwick in the UK, said in a statement.

What is a helium nova?

Helium novas like V445 Puppis occur when a white dwarf dead star cannibalistically strips helium-rich but hydrogen-poor matter from a star that has already lost its outer layer of hydrogen, exposing inner layers of helium; forming a rare "helium star." By contrast, "ordinary" novas are explosions triggered by the buildup of stolen stellar matter rich in hydrogen, not helium.

As the material accumulates on the surface of the white dwarf (a type of stellar remnant left behind when stars around the mass of the sun die) it creates runaway pressures and temperatures that eventually trigger a thermonuclear explosion.

When V445 Puppis went nova back in late 2000, it launched vast, twin plumes of debris that resemble butterfly wings. Stretching out for more than a trillion miles, astronomers initially spotted this bipolar outflow in infrared. The nova also spawned a thick disc of dust that completely obscured the binary star system. That cloud persisted for over two decades, preventing astronomers who were investigating the expanding debris from determining what kind of stars the blast originated from.

Once the debris cleared, this team determined that the system contained a helium star, one of only a few thousand of these stripped stellar bodies to be discovered among the billions of stars that populate the Milky Way.

"The culprits behind this galactic eruption have been an enduring mystery over the past 25 years, which is why it is very exciting to confirm that this helium nova was the result of a helium star accreting onto a white dwarf," Mills said.

The findings also revealed cosmic "bullets" that are even more remarkable, as they have never been seen around any other novas. Intriguingly, the team also found that V445 Puppis may be about to go nova again, and this could lead to an entirely different type of cosmic explosion.

Is V445 Puppis about to blow its top again?

Mills found that the white dwarf in V445 Puppis has overcome its stellar indigestion and is once again feeding on its companion helium star.

This is the process that led to the initial helium nova, and could mean that another episode of this rare type of cosmic explosion is soon to occur.

That has implications for our understanding of another type of cosmic eruption, this time a type of supernova called a Type Ia supernova. These occur when white dwarfs overfeed on companions and are completely destroyed by the resultant explosion.

Scientists have long suspected that repeated helium nova eruptions could lead to final Type Ia supernovas.

A new Type Ia supernova would be exciting because these events are so regular in terms of their light emission that they can be used as so-called "standard candles" to measure cosmic distances and gauge the age of the universe.

This means that they can also be employed in the quest to understand how fast the universe's expansion is proceeding, and the influence of the mysterious force called dark energy on this process.

"I look forward to seeing how this result may help us uncover what powers other similar hydrogen-poor astronomical explosions, such as the famous Type Ia supernovas," Mills said.

The team's research was presented this week at the Royal Astronomical Society's National Astronomy Meeting in Birmingham, UK.

For several years now, astronomers who study the sun have faced a little mystery — our star seemed to hold too little silver. Whenever scientists examined the sun's outer layers, they've seen significantly less silver than they've expected to find.

Where, then, did the missing silver go?

As it turns out, this mystery may finally be solved. Newly published research suggests that the sun's missing silver may have been hiding in plain sight all along.

At first, the real mystery might seem to be why you'd seek silver in the sun at all. After all, 98.5% of the sun's mass is made from lightweight hydrogen and helium. Silver is just a tiny fraction of the remaining 1.5%, which also includes traces of other heavy elements like iron and copper.

These trace elements can illuminate the history of the cosmos. Silver is thought to form when dying stars violently explode in supernovas. When astronomers find silver in the sun and other stars, they can retrace the silver's origins and how stars have evolved over the eons.

"By studying the light of stars of different types and ages, we hope to understand where silver is formed in the universe, and how it has been distributed throughout the Milky Way over time," says Sema Caliskan, the lead author of the research and now a postdoc at the University of Liège in Belgium, in a statement.

Silver is particularly interesting because it's also found in utterly ancient meteorites called CI chondrites. These meteorites formed from the same primordial matter that created the sun, 4.6 billion years ago. As a result, when scientists break into CI chondrites that have fallen to Earth, they expect to find silver levels that match those they see in the sun.

Astronomers can measure the latter from afar by looking at sunlight's spectral lines. As light streams out from the sun's heart, it crashes into the atoms of our star's outer layers, which absorb the light at certain wavelengths. Look at a spectrum of sunlight, and you'll see dark lines where light has been absorbed. Atoms of different elements absorb different wavelengths, so each element leaves a distinct fingerprint.

Scientists can pore over these spectral fingerprints to reconstruct what elements created them and in what quantities. Therein lies the mystery: The sun seemed to contain much less silver than CI chondrites would indicate. This missing silver is a source for confusion in the sun's history.

Caliskan and her colleagues wondered if astronomers were missing something. They could not visit the sun in person, but they could still find where the silver might be hidden by simulating the sun's atoms on a computer. If they could create a high-silver model that still spawned the low-silver spectral lines, that model could be a good guess for the silver's whereabouts.

Other scientists had tried this before to limited success, but their simulations had been relatively simple. As light strikes an atom, the light has all sorts of intricate effects on the atom's innards. These effects can alter how the atom absorbs the light and, therefore, change how astronomers see that light.

Past models hadn't accounted for many of these tricky "non-equilibrium effects", because simulating them is far easier said than done. They're messy and complex and they vary a great deal from atom to atom.

In fact, no known scientists had ever tried to simulate a silver atom with non-equilibrium effects before Caliskan and her fellow investigators took on the challenge. They tried with their best guesses and the power of the Tetralith supercomputer in Linköping, Sweden.

Indeed, these non-equilibrium effects seem to explain the silver mystery. Based on their model, Caliskan and colleagues calculated that the sun holds 55% more silver than astronomers have measured.

This isn't a perfect match for the CI chondrites, but it's close enough that investigators can rule out any extraordinary cause. Instead, the missing silver may have been right there, in the sun all along, simply occluded from astronomers' view by tricks of physics. Next, Caliskan and colleagues plan to use this method to simulate other types of stars.

They published their work in the journal Astronomy & Astrophysics in July 2026.

In satellite data captured over Antarctica, what appears to be a beautiful, colorful hummingbird emerges from the crest of a mountaintop.

What is it?

While there are no hummingbirds flying around Antarctica, we can see what looks like a small, purple bird in a new satellite image of an Antarctic mountain. The dark belly of this "bird" at the center of this image is actually the top of the mountain Nunatak Zaterjavshijsja in East Antarctica.

What looks like a bird's tail is a stream of ice flowing northeast all the way out to the ocean, and what appear to be feathers splaying outward from the mountaintop are actually crevasses down the mountain. These crevasses are formed by a glacier fracturing the mountain's surface as it flows in the icy current toward the ocean.

This view was captured by radar instruments onboard the satellite NISAR (NASA-ISRO Synthetic Aperture Radar) that launched as a collaboration between NASA and ISRO (Indian Space Research Organisation). The director of NASA's Earth Science Division called NISAR "the most sophisticated radar we've ever built" in a pre-launch briefing last year.

Why is it incredible?

At first glance, this image is puzzling. What could it possibly be? Its bold colors and sharp lines evoke almost alien qualities. But the strange beauty of the shapes and colors in this satellite image reveal important information about glacier movements on the mountain.

"First, it's a beautiful image, with rich details of features that provide insights to how the glacier is moving. Then, because radar can often see through snow and deep into the ice, NISAR can observe fundamentally different properties of Antarctic ice than can be seen in optical imagery," Seongsu Jeong, the signal analysis engineer who produced the image at NASA's Jet Propulsion Laboratory, said in a statement. "With NISAR we're seeing what's hidden beneath the surface."

And now anyone can explore NISAR's data. Earlier this week, on July 20, NISAR started making the data from its radar instruments public. Moving forward, mission teams will be rolling out this data so researchers everywhere can use it to study and protect our ever-changing planet.

Paleontologists now know that many of the dinosaurs didn't disappear but instead evolved into modern birds, and new research suggests that "cosmic dinosaurs" observed by the James Webb Space Telescope (JWST) didn't go extinct either. Rather, they may have evolved into familiar sights in the modern universe: vast conglomerations of densely packed stars called "globular clusters."

Little Red Dots became quite the puzzle for astronomers in 2022, when the JWST began to routinely spot them in abundance around 600 million years after the Big Bang. That is because these objects seemingly disappear before the cosmos gets to around 2 billion years old.

Astronomers have proposed many different explanations for Little Red Dots, including the suggestion that they could be "black hole stars," or black holes wrapped in vast shrouds of dense gas and dust. This team theorizes that a forming globular cluster with a supermassive star, a hypothetical short-lived stellar body with between 1,000 and 10,000 times the mass of the sun, would also look a lot like a Little Red Dot at its heart.

"These may not be just a strange new JWST population with no connection to the universe around us today," team leader John Chisholm of the University of Texas Austin said in a statement. "Instead, Little Red Dots may persist past the early universe, evolving into something relatively familiar.

"Little Red Dots could be galaxies, they could involve black holes, or they could be something even more unexpected. Our work shows that forming globular clusters with supermassive stars should be part of that conversation."

An unfamiliar side to a familar sight

Globular clusters are generally seen in large galaxies and are densely packed with up to many millions of ancient stars. Our galaxy, the Milky Way, is host to at least 150 globular clusters, and though familiar, astronomers still aren't quite sure how they form.

"We usually see them [globular clusters] after billions of years of evolution, at a time when their massive stars are gone, their gas has been cleared out, and dynamical processes have changed their masses and structures," team member Danielle Berg of UT Austin said in the statement. "That makes it very hard to reconstruct the original conditions they formed in."

It is thought that the stars in globular clusters all formed at the same time in the early universe. However, at this time the cosmos should only have had hydrogen, helium and a smattering of heavier elements (which astronomers call "metals") available for star construction. Yet, many stars in globular clusters are strangely abundant in helium and metals like nitrogen, sodium and aluminum, while lacking the expected levels of carbon, oxygen and magnesium.

"This specific pattern indicates nuclear fusion at very high temperatures, much higher than in the cores of even massive normal stars," team member Mike Boylan-Kolchin of UT Austin said in the statement. "A supermassive star is precisely the kind of environment that could produce this combination."

Supermassive stars capable of generating this kind of heat would form in the dense environments of early globular clusters in which stellar collisions and mergers would be expected to occur over and over again. The resultant supermassive stars would be short-lived, lasting just around 1 million years (remember the sun is middle-aged at 4.6 billion years old) — but this would be sufficient time to forge the elements needed to explain the peculiar chemistry of globular clusters.

When these supermassive stars die in supernova explosions, the elements they forged would be blasted out to become the building blocks of the next generation of stars. This would provide the stars of modern globular clusters with their unusual chemical fingerprints.

"In our model, the supermassive star that helps make the object look like a Little Red Dot would live for only a short time," Chisholm continued. "Once that star dies, the object may no longer look like a Little Red Dot, even if the cluster itself survives billions of years."

Strange chemistry isn't the only thing linking early globular clusters with Little Red Dots, however. Not only does the team propose that the distribution of Little Red Dots in the early universe matches the distribution of modern globular clusters, but they also say models of Little Red Dot evolution show that their estimated masses could easily lead to the masses of globular clusters seen in the recent universe.

There is also the issue of timing. Little Red Dots appear around 600 million years after the Big Bang, and that is also the time that scientists estimate that globular clusters would have begun to form.

"There's no single smoking gun at this point that says Little Red Dots are globular clusters, but it would explain a lot of diverse and surprising observations," said Boylan-Kolchin.

This study is currently available to view as a pre-print on the paper repository arXiv.

A near-Earth object that astronomers believed was an asteroid for nearly three decades has been unmasked as a faint, active comet, revealing a case of cosmic mistaken identity that could help improve planetary defense.

The object, known since its discovery in 1998 as 1998 SH2, appeared to be an ordinary asteroid. It follows a 4.5-year orbit around the sun and showed no obvious signs of cometary activity, such as the glowing coma or tail produced when sunlight vaporizes surface ice.

However, during a close pass about 2 million miles (3 million kilometers) from Earth in August 2025, researchers using NASA's Deep Space Network planetary radar system noticed something unexpected: The object wasn't where orbital predictions said it should be, according to a statement from the space agency. That discrepancy prompted scientists to take a closer look, and what they found surprised them.

Using decades of precision optical astrometry — measurements of the object's position against background stars — researchers found that gravity alone couldn't explain its irregular motion. Instead, they detected tiny nongravitational forces consistent with jets of gas escaping from the object's surface as hidden ice warmed in sunlight.

"After we measured the nongravitational perturbations affecting the motion of 1998 SH2 and recognized they weren't compatible with the object being an asteroid, we suspected the object could be an active comet," Davide Farnocchia, lead author of the study and navigation engineer with NASA's Center for Near-Earth Object Studies at the Jet Propulsion Laboratory, said in the statement.

To test the idea, the team observed the object with the European Southern Observatory's Very Large Telescope in Chile and the Canada-France-Hawaii Telescope atop Mauna Kea. The observations revealed a faint but unmistakable comet tail, confirming the object's true identity.

The discovery earned 1998 SH2 a second designation: P/1998 SH2, officially recognizing it as a comet. Beyond solving the mystery, the finding has important implications for planetary defense.

Unlike rocky asteroids, comets can subtly change course as gas escaping from their surfaces acts like tiny thrusters. Identifying those nongravitational forces allows scientists to more accurately predict an object's future orbit and assess any potential impact risk.

"This work shows the importance of continuously tracking near-Earth objects," Farnocchia said in the statement. "Because of outgassing, the motion of comets is more significantly perturbed than that of asteroids.

"Detecting these perturbations can be an important diagnostic tool for planetary defense that will help understand which objects may be comets rather than asteroids, how their orbits evolve, and how that influences their Earth impact risks."

The study also suggests that 1998 SH2 may not be unique. The researchers noted that analyzing the motions of near-Earth objects with increasingly precise astrometry could reveal more hidden comets that have long been classified as asteroids because they lack obvious tails or glowing comas.

As astronomers continue to monitor the growing population of near-Earth objects, subtle orbital changes may prove just as revealing as spectacular comet tails, uncovering more examples of cosmic mistaken identity while helping scientists better understand which objects pose potential threats to Earth.

Their findings were published July 10 in the journal Nature Astronomy.

The launch of NASA's next super telescope, the Nancy Grace Roman Space Telescope (Roman), may mean there is nowhere left for violent black holes to hide.

In fact, these cosmic cannibals may not even be able to hide from Roman at "cosmic noon," a period of the universe's history that occurred around 11 billion to 12 billion years ago. The study of these gory stellar events so early in the history of the universe could help reveal how supermassive black holes grew so big, so rapidly.

Occurrences of black holes ripping apart stars are called tidal disruption events (TDEs), and they happen when an unfortunate star's orbit brings it too close to the immense gravitational influence of a supermassive black hole. This simultaneously squashes and squeezes the star in a process called "spaghettification," with plasma pasta wrapping around the black hole and being fed gradually to it.

Because supermassive black holes are wrapped in a one-way, light-trapping boundary called an event horizon, the only way to study them is when they are actively consuming surrounding matter. Such matter swirls around them in what are known as accretion disks.

However, lighter supermassive black holes aren't ravenous feeders, making them harder to investigate. That is, until a star gets too close and is shredded in an incredibly bright TDE that can outshine the combined light of every star in the supermassive black hole's host galaxy. TDEs are more common to supermassive black holes with masses of about 100,000 to 100 million suns, because supermassive black holes with masses over 1 billion solar masses tend to immediately swallow their stellar snacks.

Previous research has suggested TDEs wouldn't be common in the early universe, because the first supermassive black holes wouldn't even have a mass of 100,000 times that of the sun and thus wouldn't shred stars. However, a new study has reassessed the frequency of TDEs around 1 billion to 2 billion years after the Big Bang, finding they could be more common than previously estimated. Especially during the crowded conditions found during cosmic noon.

Set to launch on Aug. 30, 2026, scientists are hoping Roman's High-Latitude Time-Domain Survey, which will repeatedly revisit a region of the sky equivalent to 90 full moons, will be a powerful tool in the hunt for TDEs in the early universe and their subsequent study. This team estimated that Rubin will detect thousands to tens of thousands of TDEs each year, with 100s dating back to cosmic noon.

"The Roman Space Telescope is going to be transformative for transient science [transients are astronomical events that light up the sky then fade away]," research team leader Mitchell Karmen of the Johns Hopkins University said in a statement. "Thanks to Roman's high sensitivity, we can find multiple tidal disruption events out to greater distances and earlier cosmic times than ever before."

This means Roman is ideally poised to solve a puzzle that has developed since its predecessor, the James Webb Space Telescope (JWST), began beaming data back to Earth in July 2022.

How could early TDEs solve the puzzle of black hole growth

Supermassive black holes with masses equivalent to millions or even billions of suns are found at the hearts of all large galaxies. When they are seen in the relatively local universe, that isn't so problematic; they have had plenty of time to grow via mergers and feeding.

However, the JWST has been routinely spotting supermassive black holes prior to the universe being even 1 billion years old. That is troubling because these early black holes should have had to undergo at least 1 billion years of mergers and gluttonous feeding to reach supermassive status. Scientists have two prevailing theories as to how this growth may have happened.

The first suggests supermassive black holes grow from "light seeds," beginning with black holes with masses just a few hundred times that of the sun that are born from the death and collapse of massive stars.

Such black holes might weigh up to a few hundred times the mass of the sun. These black holes would then merge over time, as well as consume surrounding gas at an incredible rate that facilitates rapid growth. For this theory to be the right one, every young galaxy would have to harbor a massive black hole at its center.

The second theory suggests early supermassive black holes grew from "heavy seeds" created directly from the collapse of vast clouds of primordial gas and dust. This would allow rapid growth because black holes could begin the whole merger and feeding process before the first stars lived and died.

Should this be the correct pathway, however, the fact that collapse events would be rare would make massive black holes at the heart of cosmic noon galaxies less common.

Because TDEs are common to less massive supermassive black holes, counting their occurrence at cosmic noon could give an indication of the masses of black holes during that epoch — the key to determining between heavy seeds and light seeds.

"Tidal disruption events help us probe the population of light supermassive black holes, which can help us discriminate between these models," Karmen said.

"Just by counting the number of TDEs as a function of redshift [a measure of cosmic distance], you can put meaningful constraints on the population of million-solar-mass black holes. Roman will be transformative in that it can probe tidal disruption events out to greater distances, so you can look at how the rate of TDEs evolves over time," team member Suvi Gezari, an associate professor of astronomy at the University of Maryland, said. “Just like the JWST has transformed our understanding of distant, high-redshift [very distant] galaxies, Roman is poised to transform our understanding of high-redshift transients."

The team's research was published on July 14 in The Astrophysical Journal.

Since the discovery of the first world beyond the solar system in the 1990s, astronomers have become adept at spotting extrasolar planets, or exoplanets. But while NASA's exoplanet catalog has burgeoned to over 6,000 confirmed entries, moons around these worlds, known as exomoons, have proved elusive.

In fact, we have failed to make a single confirmed discovery of an exomoon despite being certain that just as the planets of the solar system have their own natural satellites, worlds in other star systems must have them too.

Now, this controversial drought of exomoons may have become even more confusing and, frankly, weird. That is because while studying a strange star system called CD-35 2722 with the Very Large Telescope (VLT), astronomers have discovered an object that could be an exomoon, or it could be something that forces us to rethink our very definition of what a "moon" is and what a "planet" is.

The star CD-35 2722 is located around 73 light-years away and has around half the mass of the sun. It is orbited by a "failed star" or brown dwarf. These stellar bodies get their unfortunate nickname because they form like other stars but fail to gather enough mass to trigger the fusion of hydrogen to helium in their cores. In terms of mass, brown dwarfs are more massive than the largest gas giant planets, but smaller than the smallest stars, usually with around 13 to 80 times the mass of Jupiter, or around 0.013 to 0.08 times the mass of the sun.

The newly discovered object in CD-35 2722 is certainly moon-like, but rather than orbiting a planet as the moons in the solar system do, it orbits the system's brown dwarf.

"This system is somewhat hard to define using solar-system-based words like 'planet' and 'moon.' The exosatellite is clearly massive enough to be a planet, but it does not orbit a star, though it orbits an object that orbits a star," team leader Kevin Hoy of the Universidad Diego Portales and the Millennium Nucleus of Young Exoplanets and their Moons (YEMS) in Chile, said in a statement.

"Being the third wheel in this system makes us want to call it a moon, even if it is nothing like the small, rocky moons we have in our system."

The team's research was published on Wednesday (July 22) in the journal Nature.

Erm... It's definitely an exosatellite

The team currently isn't able to definitively claim this object in CD-35 2722 is an exomoon, because that would require really nailing down a new definition of what a moon is.

"The satellite we report is a giant gaseous body orbiting a highly massive companion, itself several times the mass of Jupiter. We have a clear delineation between the planets and the sun in the solar system, so defining things like moons is simple," team member Alice Zurlo of the Universidad Diego Portales said. "In the CD-35 2722 system, where we are blurring the lines between stars, planets, and moons, the whole thing becomes more complicated to describe."

Zurlo and colleagues can, however, confidently claim this is an exosatellite, meaning it is a first-of-its-kind detection no matter what the future holds for its classification.

It is hoped that the Extremely Large Telescope (ELT) currently under construction in Chile, will make a massive impact in the hunt for exomoons, and now, other exosatellites.

Until these objects begin to be uncovered, one thing this discovery re-emphasizes is something that astronomers have been gleefully discovering ever since the first exoplanet was spotted: planetary systems come in a variety of diverse, weird and wonderful forms.

You're looking at history. What might seem like a simple black-and-white picture of some rocks is actually the first photograph ever taken on the surface of Mars.

What is it?

Bright and early on the morning of July 20, 1976, NASA's Viking 1 lander touched down on the surface of Mars. This moment 50 years ago marked the first fully successful touchdown on the Red Planet, and, pretty much as soon as it landed, Viking 1 captured the first image of the Martian surface.

The Soviet Union had already made multiple Mars landing attempts, all of them failures to some degree. The nation's Mars 3 lander did manage to survive its landing initially in December 1971, but it lost contact less than two minutes later.

Viking 1 did more than just survive. While its mission tasked the lander with studying the planet for 90 days after landing, it lasted over six years on the planet and made some incredible observations. The Viking 1 lander worked in tandem with an orbiter by the same name, and was soon joined at Mars by Viking 2, another lander/orbiter pair.

Why is it incredible?

It has now been 50 years since Viking 1's historic first, which opened our eyes to the Martian surface. And NASA has kept improving technologies and exploring further on Mars ever since. Agency rovers began scouring the planet's surface in the 1990s, so we have gathered data on the planet's surface for decades upon decades at this point.

But in 1976, no one had ever seen the surface of Mars close up. This view was preceded by science fiction like Ray Bradbury's "The Martian Chronicles," which painted fantastical possibilities about what it might really be like on Mars. With Viking 1's view, we finally got some concrete evidence of the reality on the planet.

In 50 years, our understanding of Mars, our solar system and beyond has grown tremendously. But with each major accomplishment, we can look back at previous milestones such as this to see the stepping stones that paved the way to get us there.

Swelling from a razor-thin crescent into a cratered world before fading back into the darkness, Mars gave NASA's Psyche spacecraft both a spectacular view — and a 1,000-mph boost toward its namesake asteroid.

A new time-lapse video released by NASA, stitched from images taken throughout May, captures the probe's month-long encounter with Mars. On May 15, Psyche swooped within 2,864 miles (4,609 kilometers) of the surface, using the planet's gravity to boost its speed and adjust its trajectory toward asteroid Psyche, a metal-rich world in the main asteroid belt between Mars and Jupiter that the spacecraft is scheduled to reach in 2029.

"This gravity assist was years in the making, and the navigation team nailed it — Psyche flew by Mars on exactly the trajectory we needed to set us on a path to rendezvous with the asteroid in the summer of 2029," Bob Mase, Psyche's project manager at NASA's Jet Propulsion Laboratory in California, said in a statement.

Approaching from a steep or what scientists call a "high phase" angle relative to the sun, Psyche initially caught Mars as a slender crescent with just 4 percent of its disk illuminated and its thin atmosphere glowing in scattered sunlight, Hannah Zigo, a Psyche team member at the Arizona State University, said in a NASA video accompanying the statement.

As the spacecraft closed in, the video follows Mars steadily expanding to reveal numerous craters puncturing its surface, the ancient double-ringed Huygens crater and the south polar ice cap before receding in the spacecraft's rearview.

The flyby served a dual purpose. By aiming Psyche's suite of instruments at a well-studied world, engineers say they calibrated and validated the spacecraft's scientific payload ahead of its 2029 destination.

"We didn't anticipate big discoveries, given how extensively the planet has been studied," Lindy Elkins-Tanton, principal investigator for the Psyche mission at the University of California, Berkeley, said in the statement, "but we did complement Mars science with the data we collected through Psyche's unique perspective."

All three of the spacecraft's science instruments performed as expected, according to NASA. Its gamma-ray and neutron spectrometer, designed to determine the asteroid's elemental makeup, detected the predicted surge of escaping neutrons during closest approach, confirming its operational readiness.

The mission's magnetometer, which will search for evidence that asteroid Psyche is the metallic core of an early planetesimal, recorded its first magnetic signature from a planetary body since its launch in 2023, detecting the bow shock where the solar wind meets Mars' magnetic environment.

Psyche's twin multispectral cameras also passed their calibration tests, capturing the frames for the time-lapse while spotting Mars' tiny moons, Phobos and Deimos, from a distance, the NASA statement read.

Spotting the moons served as "a practice for the satellite search that we'll use at the asteroid Psyche to look for any moonlets there," Jim Bell, a planetary scientist at Arizona State University who leads the multispectral imager instrument team, said in the statement.

With Mars in its rearview and its instruments fully vetted, Psyche remains locked on course for its summer 2029 rendezvous with the metal asteroid.

"The spacecraft is in great shape, and we're on schedule to resume sustained thrusting with the solar-electric propulsion system later this fall," Mase said.

Using the James Webb Space Telescope (JWST), astronomers have discovered the secrets of early galaxies that pumped the infant cosmos full of dust, which would become vital for the birth of new stars and the growth of galaxies.

However, while the JWST is powerful enough to see many of these early galaxies, it is still limited when it comes to delving into them in great detail. So, the team at the heart of this research worked around this by studying a much closer and more modern galaxy with many characteristics that resemble the universe's first galaxies.

In lieu of being able to study the processes that occurred in the early universe that allowed galaxies to be seeded with "metals, (the term astronomers use to describe elements heavier than hydrogen and helium), the researchers turned their attention to a dwarf galaxy just 4.6 million light-years away.

"Directly studying the galaxies that populated the early universe is still very difficult, which is why observing a nearby galaxy like Sextans A, which presents similar chemical conditions, offers us a precious opportunity to understand how the first generations of stars evolved and what role they played in transforming the interstellar medium," team leader Claudio Gavetti of the National Institute for Astrophysics (INAF) said in a statement.

How does Sextans A impersonate ancient galaxies?

The early universe was a pretty dull place in terms of chemistry. That is because it was dominated by the lightest element, hydrogen, with some helium and a tiny smattering of heavy elements, or metals. That means that the first generation of stars, so-called POP III stars, were correspondingly metal-poor.

During their lives, however, POP III stars fused hydrogen and helium in their cores to forge heavier elements. When these original stars reached the ends of their lives, they exploded in supernova explosions that dispersed these metals into the interstellar medium, the vast clouds of dust and gas between stars.

Eventually, dense and cool patches in these vast clouds collapsed under their own gravity, birthing the next generation of stars, POP II stars, which, thanks to the supernova deaths of their predecessors, were richer in metals.

Our own star, the sun, is classed as a POP I star, meaning it is even richer in metals than these second-generation stars. However, not all modern galaxies are so metal-rich; this is especially true for dwarf galaxies like Sextans A, even though it lies at the outer edge of our cosmic backyard, known as the "local group."

Sextans A is so metal-poor that it is estimated to contain only between 1% and 7% of the heavy elements found in the sun. That makes it a great proxy for the study of metal-poor early galaxies.

Using the JWST's NIRCam (Near-InfraRed Camera) and MIRI (Mid-Infrared Instrument) instruments, Gavetti and colleagues obtained high-resolution observations of Sextans A that allowed them to map the dwarf galaxy's entire population of stars during an evolutionary phase known as the "asymptotic red giant branch."

This phase occurs when stars larger than the sun exhaust helium in their cores, creating an inert carbon heart, but nuclear fusion continues in outer alternating helium- and hydrogen-burning layers. These stars "puff out" as a result of this and can undergo thousandfold increases in brightness.

The team's findings revealed that around 90% of the asymptotic red giant branch stars they studied were not surrounded by envelopes of dust. However, around 20 or so of these stars were embedded in thick dust shells. They also found that these "dust factories" formed between 2 billion and 3 billion years ago from stars with an initial mass about 1.5 times the mass of the sun.

This research is a leap forward in understanding which stars in the early universe were most likely to create the metal dust that would have enriched the next generations of stars. That means it helps paint a complete picture of how the universe as we see it today took shape.

The scientists behind this study say that this type of research would have been impossible before the launch of Webb.

"The JWST allows us to observe in unprecedented detail environments that until a few years ago were beyond our reach," team member Flavia Dell'Agli of the INAF. "The value of these data lies not only in the images, but in the ability to compare them with theoretical models and verify how correctly they describe the evolution of stars."

The team's research was published on Monday (July 20) in The Astrophysical Journal.

For the first time, scientists may have discovered a binary system—like the twin suns of the fictional planet Tatooine in "Star Wars"—where both stars exploded as supernovas, a new study finds.

Although Earth may orbit around a single star, more than half of all stars are in systems where two or more suns orbit each other. "When it comes to massive stars, the percentage in multiple systems are even higher," study lead author Miltiadis Michailidis, a postdoctoral fellow at Stanford University in California, told Space.com.

When massive stars burn all their fuel, they can die in giant explosions known as supernovas. These outbursts can briefly outshine all of the other suns in these stars' galaxies. They often leave behind expanding super-hot clouds of debris known as supernova remnants. Astronomers have detected about 300 such remnants in our galaxy to date.

Given how often massive stars are found in binary systems, "one can expect many pairs of massive stars where both will explode as supernovas," Michailidis noted. "However, this has never been observed, until now."

One reason supernova pairs may have escaped attention is that "if the stars are too close together when they exploded, the resulting supernova remnants may look like that from a single explosion," Michailidis explained. Another is that one star going supernova may propel its partner far enough away to hide the fact they were ever a duo, he added.

In the new study, Michailidis and his colleagues investigated a supernova remnant known as IC 443, located about 6,000 light-years from Earth in the constellation Gemini. IC 443 is also known as the Jellyfish Nebula for how it resembles a jellyfish.

IC 443 is one of the most extensively studied supernova remnants in the galaxy because of how shock waves from the supernova have collided with surrounding clouds of gas and dust to create a set of concentric bubble shells, "much like how a drop of water falling on a lake creates circular waves," Michailidis said. "It is very isolated from its surroundings, without many other objects nearby to complicate its very bright emissions."

The scientists analyzed one of IC 443's much dimmer, long-hidden neighbors, dubbed G189.6+3.3. The German-led ROSAT (Roentgen Satellite) mission first discovered G189.6+3.3 in 1994 via its faint X-ray emissions, and the Russian-German Spektrum Roentgen Gamma (SRG) space observatory later clearly detected shell-like structures within G189.6+3.3, suggesting that it was a supernova remnant.

In the new study, the researchers analyzed more than 16 years of data from NASA's Fermi Gamma-ray Space Telescope along with earlier X-ray, optical and radio measurements. They discovered signs that both IC 443 and G189.6+3.3 were both smashing into the same interstellar cloud of hydrogen, revealing they were close together in space, with the centers of their explosions about 30 to 50 light-years apart.

The researchers calculated that the chances of randomly encountering two unrelated supernova remnants at this distance from one another "was about one in 1,000," Michailidis said. "This suggests that our discovery is in fact the first known binary-system supernova pair."

The scientists estimated that G189.6+3.3 was older than IC 443, with the parent star of G189.6+3.3 exploding between 20,000 to 110,000 years ago, while IC 443 was created about 8,000 to 9,000 years ago. The original stars may have been 20 or more times the sun's mass.

These new findings can help shed light on how massive binary stars evolve, interact and die. For instance, further analysis of G189.6+3.3 and IC 443 can reveal how much of a kick the former gave the latter when it died, Michailidis said.

The scientists detailed their findings July 21 in the journal Nature Communications.

A young cluster of galaxies sparkles under a cosmic glow that's 4.4 billion years old. This peek into the past shows the stellar spectacle of a galaxy cluster still forming.

What is it?

The James Webb Space Telescope snapped this image of the galaxy cluster MACS J0553.4-3342 on July 3 using its near-infrared camera (NIRCam). The glorious, glimmering sight is actually a massive young galaxy cluster forming 4.4 billion years ago. A galaxy cluster is a grouping of galaxies held together by gravity. Galaxy clusters can contain hundreds or even thousands of galaxies and are the largest known structures in the entire universe that are held together in this way.

Why is it incredible?

Because light takes time to travel through space, and because the JWST can look incredibly far out into space, this telescope acts as a sort time machine.

This power isn't unique to the JWST, however. Other telescopes like the Hubble Space Telescope, for instance, have similarly peered back in time through the cosmos and revealed some incredible, ancient sights. However, the JWST's specialized instruments like NIRCam allow the telescope to pick up incredibly faint light from galaxies remarkably far away. This greatly stretches how far back in time we can see.

But the really incredible thing is, you can look back in time yourself — with only your eyes. While JWST can look exceptionally far out into space and can capture the very faint light of ancient galaxies, the light coming from the stars you can see with your bare eyes also had to travel over incredible stretches of time to reach you. Think about this: the light coming from a constellation you love may have traveled across millions of light-years to get to your eyes.