22 July 2015, 05:20 PM ET
Globular clusters are densely packed, spherical collections of ancient stars. They contain hundreds of thousands, and sometimes millions, of stars.
22 July 2015, 02:04 PM ET
Not only has NASA’s New Horizons mission confirmed that Pluto has an extended atmosphere, after its historic flyby on July 14, the spacecraft observed a “cavity” in the solar wind, revealing a long plasma tail reminiscent of a comet’s ion tail.
22 July 2015, 12:00 PM ET
Learn about the discovery of dwarf planet Pluto, its fascinating orbit and atmosphere and the controversy surrounding its planetary status.
22 July 2015, 11:26 AM ET
The guitar player and astrophysicist was at the New Horizons' mission control when the "first 2 by 2 mosaic full-planet picture was downloaded from the probe." He assembled the two images for viewing in a stereoscopic viewer.
22 July 2015, 07:01 AM ET
The mysterious smudges central to this new image are an ancient galaxy in the throes of formation — and for the first time we can glimpse its off-kilter structure. See how the galaxy BDF 3299 is revealing clues of the early universe.
22 July 2015, 07:00 AM ET
The Curiosity rover on Mars has turned its cameras skyward and found sunspots brewing on the far side of the sun, a view that's impossible to get from Earth.
21 July 2015, 05:48 PM ET
New Horizons has spotted a second mountain range inside Tombaugh Regio, the 1,200-mile-wide (2,000 kilometers) heart-shaped feature that mission team members named after Pluto's discoverer, Clyde Tombaugh.
21 July 2015, 02:24 PM ET
New photos captured by NASA's New Horizons spacecraft during its historic Pluto flyby last week reveal intriguing new details about Nix and Hydra, two of the dwarf planet's five satellites.
21 July 2015, 01:43 PM ET
Hydra and Nix were snapped from a distance of ~600,000 kilometers on July 13th and again on July 14th at a distance of 231,000 kilometers (Hydra) and 165,000 kilometers (Nix).
21 July 2015, 08:04 AM ET
NASA's New Horizons mission to Pluto just got funky (with awesome results) in this music video, which blends a healthy dose of science with the tune "Uptown Funk" by Mark Ronson , featuring Bruno Mars.
21 July 2015, 08:00 AM ET
Searching for life on exoplanets can be a challenge if the planet is covered in clouds — but a new technique could identify cloudy planets before astronomers spend precious telescope time studying them.
21 July 2015, 02:10 AM ET
Famed physicist Stephen Hawking helped launch a major new search for intelligent alien life, despite having strong fears that such creatures would destroy humanity.
20 July 2015, 03:00 PM ET
NASA released today (July 20) the first image of the sunlit side of Earth taken by the Deep Space Climate Observatory (DSCOVR) spacecraft from its final science orbit, and the beautiful photo has already made quite an impact.
20 July 2015, 12:13 PM ET
A new $100 million, 10-year search for intelligent life in the universe was announced today (July 20) by famed scientist Stephen Hawking and other prominent researchers.
20 July 2015, 10:34 AM ET
Kelsea Brennan-Wessels from the European Space Agency's 'Earth From Space' series tours the five boroughs with a satellite image captured by Japan's ALOS satellite in 2010. The video was produced to promote ‘My Planet from Space’ exhibition.
20 July 2015, 07:00 AM ET
New Horizons zoomed within 7,800 miles of Pluto's surface on July 14, capturing the first up-close images of the dwarf planet. Though the probe is now speeding into the depths of the faraway Kuiper Belt, it still has a lot on its plate.
20 July 2015, 07:00 AM ET
Blasting tiny, waferlike sailing spacecraft with powerful lasers could slash interstellar flight times from thousands of years to mere decades, one researcher says.
19 July 2015, 08:33 AM ET
Ancient Egyptian gods and goddesses provide the names of the 19 regions on Comet 67P — in a recent blogpost on the European Space Agency's website, a scientist reminisced about how the names were chosen.
19 July 2015, 08:00 AM ET
The battle over Pluto's status as a planet continues, not only in academic circles but also in my home.
19 July 2015, 03:42 AM ET
NASA's New Horizons probe dominated the news cycle this week, after making a successful close encounter with Pluto, and sending back incredible images and data. Plus, an astronaut mining company launched a tech-testing satellite.
19 July 2015, 03:19 AM ET
Gorgeous views of Pluto and its ice mountains, its largest moon Charon to the release of Plutos USPS stamp, don't miss these amazing space images.
18 July 2015, 09:09 AM ET
The first close-up image of Nix snapped by the New Horizons probe reveal that Pluto's third satellite is only 25 miles (40 kilometers) wide.
18 July 2015, 09:00 AM ET
Rings of X-ray light flare and fade around an active black hole in a stunning new set of observations by NASA's Swift space telescope. The bull's-eye structure results from the reflection of X-ray light by dust, which creates a series of "echoes."
17 July 2015, 06:14 PM ET
Dawn began spiraling down to its third Ceres science orbit on June 30 but experienced a problem almost immediately and went into a protective "safe mode." The mission team has now determined what happened and cleared Dawn to return to work.
17 July 2015, 03:43 PM ET
The engimatic flat region, which researchers have dubbed "Sputnik Planum," is broken into cell-like blocks and harbors mysterious pitted terrain and dark streaks of material that may have been deposited by Plutonian wind.
17 July 2015, 02:39 PM ET
"Buckyball" molecules appear to be commonplace across the universe, and may even be sources of organic molecules that are key to the origin and evolution of life, a new study suggests.
17 July 2015, 11:00 AM ET
When cosmic bullies collide with galactic dwarfs, the big guy comes out on top. A new study shows that star formation is halted in smaller galaxies that collide with large ones.
17 July 2015, 07:00 AM ET
The new images, which New Horizons captured during its historic flyby of Pluto on Tuesday (July 14), will be released in concert with a news conference that starts today at 1 p.m. EDT. You can follow it live here on Space.com, courtesy of NASA TV.
17 July 2015, 06:00 AM ET
NASA's Juno probe is now less than one year away from its rendezvous with Jupiter. Juno, which launched in August 2011, is scheduled to slip into orbit around the gas giant on July 4, 2016.
16 July 2015, 05:05 PM ET
As NASA's New Horizons flew past Pluto on July 14, it had aboard some of the ashes of the astronomer who discovered the planet in 1930. Now, the mission team has further honored the late Clyde Tombaugh by giving Pluto's heart-shaped region his name.
16 July 2015, 02:39 PM ET
A newly released Charon photo, which was taken by NASA's New Horizons probe during its epic Pluto flyby Tuesday (July 14), reveals a mountain rising out of a big hole on the 750-mile-wide (1,200 kilometers) moon's surface.