01 July 2015, 04:44 PM ET
On June 15th 2015, a black hole 8,000 light years away sprung alive for the first time since 1989, blasting X-rays and gamma rays across the universe. Such objects are called X-Ray novas and act as their own alarm clocks.
01 July 2015, 03:00 PM ET
In anticipation of the New Horizons flyby of Pluto on July 14, this sky chart can help you find Pluto in the night sky (with the assistance of a high-power telescope).
01 July 2015, 02:00 PM ET
Space.com's editors present a reading list for space and sci-fi lovers, as well as children who are interested in astronomy and spaceflight.
01 July 2015, 01:01 PM ET
Strange pits and divots observed on the surface of Comet 67P/Churyumov-Gerasimenko may be sinkholes, not unlike those that appear on Earth, a new analysis suggests.
01 July 2015, 11:15 AM ET
Imagery taken between 28 May and 25 June 2015 from NASA New Horizons' LORRI instrument reveals the best look yet of the icy double dwarf planet Pluto-Charon.
01 July 2015, 07:01 AM ET
NASA's New Horizons probe will cruise within 7,800 miles (12,500 kilometers) of Pluto's surface on July 14, capturing the first-ever good looks at the frigid, faraway and mysterious world.
01 July 2015, 05:26 AM ET
We rely on magnets every day, but seldom give them a second thought.
30 June 2015, 05:07 PM ET
Pluto and its largest moon, Charon, posed for a solemn portrait taken by NASA's New Horizon's probe, which is only two weeks away from its close encounter with the dwarf planet.
30 June 2015, 03:14 PM ET
Over about 4 hours on June 18th 2015, NASA’s Solar Dynamics Observatory captured a developing flare and coronal mass ejection.
30 June 2015, 01:01 PM ET
The European Space Agency’s ExoMars Rover will drill up to 2 meters (6 ft. 7 in.) into the surface; previous missions have only penetrated 5 centimeters (2 in.).
30 June 2015, 01:00 PM ET
Why do so many comets have a two-lobed, "rubber ducky" shape? It's the result of gentle collisions and mergers, new simulations reveal.
30 June 2015, 10:12 AM ET
A bright object lit up the skies at 1:29 EST on June 29th, 2015 across multiple southeastern states.
30 June 2015, 07:30 AM ET
Time will stand still for one second this evening (June 30) as a "leap second" is added to atomic clocks around the world. The extra second is needed to deal with Earth's irregular but gradually slowing rotation.
30 June 2015, 07:00 AM ET
Observations by NASA's MAVEN Mars orbiter suggest that shooting stars lit up the Red Planet's skies after the close flyby of Comet Siding Spring this past October.
30 June 2015, 07:00 AM ET
The first living being sent to Mars by humans may not be some lucky astronaut, or even a monkey, but a microorganism like cyanobacteria, sent there to create oxygen for human explorers.
29 June 2015, 07:40 PM ET
NASA's New Horizons spacecraft is just two weeks away from the first-ever flyby of Pluto. Mission team members will give an update during a press conference today at 11:30 a.m. EDT (1530 GMT), and you can watch live here at Space.com.
29 June 2015, 11:11 AM ET
Examining the sizable solar flare of March 11th, 2015, NASA's Interface Region Imaging Spectrograph (IRIS) mission captured the best Temporal and spatial resolution yet.
29 June 2015, 07:30 AM ET
Huge "super-Jupiter" exoplanets could sport water-rich, potentially habitable moons up to a few times more massive than Mars, a new study suggests.
29 June 2015, 07:30 AM ET
Patches of water ice likely speckle the surface of Rosetta's comet, according to observations newly released from the European spacecraft. The orbiter spotted 120 bright spots that were at least a few meters in size.
28 June 2015, 11:38 AM ET
An exoplanet apparently possesses a huge cometlike tail, NASA's New Horizons spacecraft snapped amazing images of Pluto and a solar storm supercharged northern lights displays. Here's a look at Space.com's top stories of the week.
28 June 2015, 10:55 AM ET
From the best-ever looks at Pluto and its largest moon Charon to gorgeous views of a supercharged northern lights display, don't miss these amazing space images.
26 June 2015, 03:31 PM ET
A NASA suborbital sounding rocket filled with student experiments flew more than 71 miles (114 kilometers) high yesterday (June 25).
26 June 2015, 02:38 PM ET
Due to a "gradual slow down" of the Earth's rotation a 'leap second' has been added to June 30th. Scientists use a technique called Very Long Baseline Interferometry (VLBI) to measure how long it takes the Earth to make a full rotation.
26 June 2015, 01:02 PM ET
Astronomers may have discovered an exoplanet that has found the elixir to planetary youth — streams of radiation from its white dwarf star, which could have knocked billions of years off its apparent age.
26 June 2015, 01:00 PM ET
An active sunspot has been blasting coronal mass ejections in our direction, creating fantastic northern lights displays much further south than usual. In this case, Mike Taylor (miketaylorphoto.com) captured a multi-colored display.
26 June 2015, 12:05 PM ET
The field of mini-worlds, rubble and dust around star Beta Pictoris, 63.4 light years away, was one of the first such structure to be discovered.
26 June 2015, 07:30 AM ET
TrES-2b, a planet nicknamed "Dark Knight" because it reflects so little light, will cross the face of its host star Saturday (June 27) in a "transit" captured by the online Slooh Community Observatory. You can watch the free event live at 8 p.m. EDT.
25 June 2015, 12:58 PM ET
The northern lights, also known as the aurora borealis, painted the sky with brilliant ribbons of color this week, and the colorful displays could continue, following another solar explosion spotted by NASA.
25 June 2015, 09:56 AM ET
Sunspot AR12371 has been very busy, erupting with M-class flares that blasted coronal mass ejections (CME) toward Earth. Auroras have been seen as far south as Arizona.
25 June 2015, 07:00 AM ET
The extreme environments of Earth could serve as a time machine to Mars' past, showing us how microbial life could have coped with the changes on the red planet.
24 June 2015, 06:00 PM ET
In anticipation of the New Horizons probe making a close flyby of Pluto on July 14, this sky chart can help you spot the dwarf planet in the night sky (with the assistance of a high-power telescope).
24 June 2015, 05:12 PM ET
Singer-songwriter Craig Werth has written a song called "Oh Pluto" to highlight and celebrate NASA's New Horizons mission, which will give the world its first up-close looks at the dwarf planet during a highly anticipated flyby on July 14.
24 June 2015, 05:00 PM ET
On the surface of Mars, researchers have identified deposits of impact glass created in meteorite collisions, which could potentially hold signatures of life.
24 June 2015, 04:13 PM ET
The newly observed "X-ray echo" — the largest and brightest of its type ever caught on camera — has allowed researchers to pin down the location of the neutron star Circinus X-1, which lies 30,700 light-years from Earth.
24 June 2015, 02:23 PM ET
Astronomers have detected carbon smog permeating the interstellar atmospheres of early galaxies, confirming that these ancient galaxies were mostly dust free. The discovery should shed light on how galaxies grew in the universe's early days.
24 June 2015, 01:29 PM ET
A Neptune-size planet with a giant plume of gas streaming behind it like a comet's tail has been discovered by astronomers, and is the first such planet ever discovered.