29 September 2015, 07:00 AM ET
Unusual ripples in Saturn's rings are revealing the mysterious inner workings of the great gas giant.
29 September 2015, 07:00 AM ET
A strong solar flare took out low-frequency radio communications over South America and the Atlantic Ocean earlier today (Sept. 28), and the unstable sunspot is likely to erupt again.
28 September 2015, 04:19 PM ET
Scientists have found liquid water on Mars — does it mean life can exist there, too?
28 September 2015, 03:53 PM ET
After decades of speculation, scientists now know for sure that liquid, salty water flows on the surface of Mars. See what the discovery means in our infographic.
28 September 2015, 03:13 PM ET
Mars is all the rage, but will it ever be colonized?
28 September 2015, 02:59 PM ET
Some of the best supermoon photos come from the darkest skies.
28 September 2015, 01:36 PM ET
Crackling with flares for several days, Sunspot AR2422, blew off its strongest to date on Sept. 28th, 2015. The M7-scale event "ionized the top of Earth's atmosphere," according to Spaceweather.com.
28 September 2015, 01:01 PM ET
The enigmatic dark streaks called recurring slope lineae (RSL) that appear seasonally on steep, relatively warm Martian slopes are caused by salty liquid water, researchers said.
28 September 2015, 12:30 PM ET
Recurring dark lines on slopes – seen for more than a decade in photos by Mars orbiting spacecraft – can now be positively attributed to mineral salts precipitating from liquid water.
28 September 2015, 12:02 PM ET
"The Martian" gets astronauts right, suggests AstroCritic and former ISS commander Leroy Chiao.
28 September 2015, 10:39 AM ET
Planetary scientists have determined that recurring slope lineae flowing downhill on Mars formed by the action of contemporary liquid water.
28 September 2015, 09:00 AM ET
Lunar eclipses occur when Earth's shadow blocks the sun. There are three types; the most dramatic is a total lunar eclipse. Find out when is the next one.
27 September 2015, 11:02 AM ET
As you watch and enjoy the total eclipse of the Harvest Full Moon, read on below to see 10 things about this shady little drama that might surprise you.
27 September 2015, 07:54 AM ET
During the total lunar eclipse tonight (Sept. 27), the full moon will shine as a traditional "harvest moon." See where the harvest moon full moon gets its name.
27 September 2015, 07:01 AM ET
To see this weekend's lunar eclipse, check out the webcast by the Slooh Community Observatory, which you can watch live right here on Space.com
27 September 2015, 06:50 AM ET
Researchers and NASA officials will unveil the discovery — which the agency described in a media advisory as a "Mars mystery solved" — during a press conference Monday at 11:30 a.m. EDT. You can watch it live here on Space.com, courtesy of NASA TV.
27 September 2015, 12:57 AM ET
The origin of life is still an unsolved riddle. How were life's building blocks first assembled?
25 September 2015, 10:26 PM ET
Earth's shadow on the moon causes a massive change in temperature on its surface. NASA research scientist Jennifer Heldmann tells Space.com's @CallaCofield about how they intend on gathering data on the Moon during the Supermoon Lunar Eclipse.
25 September 2015, 06:00 PM ET
Veteran space photographers Edwin Aguirre and Imelda Joson show ways to photograph lunar eclipses in this photo guide.
25 September 2015, 04:02 PM ET
On Sunday (Sept. 27), skywatchers across the United States have a special treat: The full "supermoon" (a full moon when the moon is closest to Earth) will go into eclipse. A lunar eclipse occurs when the moon passes into the shadow of the Earth.
25 September 2015, 03:21 PM ET
If there’s one thing we’ve learned from NASA’s New Horizons flyby on July 14, it’s that we have a really incomplete understanding of planetary evolution. And now, in a new image release by the Pluto mission, there’s yet another landscape (actually, landsc
25 September 2015, 02:54 PM ET
What should observers expect to see happen during Sunday night's total lunar eclipse? Check out our guide to find out!
25 September 2015, 11:00 AM ET
The new Hubble photos, which researchers combined into several videos, show the Veil Nebula, a colorful cloud of material 110 light-years wide that lies about 2,100 light-years from Earth in the constellation Cygnus (The Swan).
25 September 2015, 07:00 AM ET
The supermassive black hole at the heart of a recently discovered galaxy called SAGE0536AGN is about 30 times larger than it should be, and astronomers don't know why.
24 September 2015, 05:32 PM ET
The Hubble Space Telescope's Wide Field Camera 3 has returned incredible imagery of the supernova remnant locoed 2100 light-years away in the Cygnus constellation. A comparison of imagery from 1997 shows that the gas filaments have moved.
24 September 2015, 02:25 PM ET
Two black holes, circling one another on their way to merging together, can create ripples in spacetime, but the waves are weaker than previously thought.
24 September 2015, 12:23 PM ET
Now that we've seen the diverse landscapes on Pluto, what does it all mean?
24 September 2015, 07:00 AM ET
Myths abound about the moon, from the fabled "dark side" to the persistent belief that the Apollo landings were faked. Here's a look at some major lunar misconceptions, just in time for Sunday's rare "supermoon" total lunar eclipse.
24 September 2015, 07:00 AM ET
The Mars Orbiter Mission (MOM) spacecraft, also known as Mangalyaan, arrived at the Red Planet on the night of Sept. 23, 2014 (Sept. 24 GMT and Indian Standard Time) — just two days after NASA's MAVEN probe reached Mars orbit.
23 September 2015, 04:55 PM ET
The winning images from the Insight Astronomy Photographer of the Year competition were announced last week, and the list is an awe-inspiring collection of celestial awesomeness.
23 September 2015, 04:31 PM ET
The Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft arrived in orbit around the Red Planet on Sept. 21, 2014, 10 months after blasting off from Florida's Cape Canaveral Air Force Station.
23 September 2015, 02:29 PM ET
The most luminous galaxies in the universe likely formed slowly via gradual accretion of gas, rather than rapidly via mergers with other galaxies, new research suggests.