20 August 2015, 12:21 PM ET
As Scott Kelly sails on through his year-long mission, the veteran NASA astronaut has beamed down several videos from his perch on the International Space Station.
20 August 2015, 07:25 AM ET
The Missile Defense Agency hopes to draft a preliminary design for a new kill vehicle by the end of the year.
20 August 2015, 07:20 AM ET
Through extremely high precision measurements of a pulsar orbiting a white dwarf star, astronomers have found that the gravitational constant, which dictates the force of gravity, is "reassuringly constant" throughout the universe.
20 August 2015, 07:01 AM ET
The 28-mile-wide (45 kilometers) Jezero Crater emerged as the frontrunner among 30 or so potential locales during the second landing-site workshop for NASA's 2020 Mars rover mission.
20 August 2015, 07:00 AM ET
NASA is inviting people around the world to submit their names to be etched on a silicon chip that will be affixed to the Mars InSight lander, which is scheduled to blast off in February 2016 and touch down on the Red Planet seven months later
19 August 2015, 06:53 PM ET
For the last few months, rumors have circulated that a big asteroid will slam into Earth near Puerto Rico between Sept. 15 and Sept. 28, wreaking widespread destruction. Don't believe the hype.
19 August 2015, 05:09 PM ET
The 1-ton Curiosity rover snapped several low-angle shots with the camera at the end of its robotic arm on Aug. 5, at a site called Marias Pass in the foothills of the 3.4-mile-high (5.5 kilometers) Mount Sharp.
19 August 2015, 04:33 PM ET
The awesome new trailer for "The Martian" is full of thrilling and stressful moments, and raises important questions about the value of human life in space exploration.
19 August 2015, 01:01 PM ET
Gas-giant planets such as Jupiter and Saturn form quickly, thanks to the fast accretion of pebble-size building blocks, new research suggests.
19 August 2015, 12:35 PM ET
Wildfire smoke can be seen blanketing northern California and Washington state in new images taken by NASA satellites.
19 August 2015, 06:00 AM ET
3,000 light-years away in the Ara constellation lies the open star cluster IC 4651. According to the European Southern Observatory, "the stars in IC 4651 all formed around the same time out of the same cloud of gas."
19 August 2015, 06:00 AM ET
A middle-aged clutch of stars shines in many colors in a new image released by the European Southern Observatory. The stars in the image are from an open star cluster called IC 4651, which lies in the Milky Way about 3,000 light-years from Earth.
19 August 2015, 05:00 AM ET
A planetarium show at New York City's American Museum of Natural History this month gave audience members a vivid look at the New Horizons spacecraft's epic flyby of Pluto.
19 August 2015, 01:30 AM ET
New discoveries are showing how dying stars illuminate the universe.
18 August 2015, 06:00 PM ET
NASA's LADEE spacecraft has made the first-ever detection of neon in the wispy lunar atmosphere, which is properly known as an "exosphere" because it's so thin — about 100 trillion times less dense than that of Earth at sea level.
18 August 2015, 04:35 PM ET
Black hole RGG 118's mass is 50,000 times that of the Sun and is 100 times less massive than the one found in the center of the milky way.
18 August 2015, 03:54 PM ET
In TWO stunning orbital photos, a thunderstorm over Mexico generated two huge, red sprites reaching into space.Ω
18 August 2015, 03:49 PM ET
The mystery behind the origin of what may be Saturn's oddest ring and its two companion moons may finally be solved: They came from an ancient, catastrophic collision, researchers say.
18 August 2015, 02:10 PM ET
An astrophotographer spotted a beautifully-formed solar prominence that looks like a giant version of the famous Parisian landmark.
18 August 2015, 12:30 PM ET
These comets were not seen in abundance until the SOHO, STEREO, and SDO observatories were put into service. Most stem from the Kreutz family of comets, fragments of a large comet that broke up several hundred years ago.
18 August 2015, 12:04 AM ET
When the magnetosphere shields Earth from these solar particles, they get funneled toward the polar regions of our atmosphere.
17 August 2015, 03:30 PM ET
After nearly 20 years gazing at the sun, the SOHO spacecraft is about to spy its 3,000th comet.
17 August 2015, 01:39 PM ET
After two giant explosions in Tianjin, a black plume of smoke snaked over China's Bohai Sea.
17 August 2015, 11:58 AM ET
Neutron stars are some of the strangest objects in the universe. This video describes that it would be like to live on one, and what horrible things they would do to you!
17 August 2015, 07:20 AM ET
A tilted orbit and a thick atmosphere could help a distant super-Earth hold onto oceans of water, making it a possible location for life to evolve.
17 August 2015, 07:00 AM ET
The Cassini spacecraft will make one last close flyby of Saturn's moon Dione on Monday (Aug. 17), in search of clues about the moon's strange features.
17 August 2015, 07:00 AM ET
Something mysterious is happening on the surface of Pluto: No matter how much nitrogen the atmosphere releases into space, it's still chock-full of the stuff. New work examines the possible culprits for the stealthy nitrogen resupply.
16 August 2015, 09:40 AM ET
The discovery of a baby Jupiter could be an important step in rewriting the book on planet formation.
16 August 2015, 09:00 AM ET
NASA astronauts eat space-grown lettuce for the first time, and burying people on the moon gets easier — here are Space.com's best space stories of the week.
15 August 2015, 07:00 AM ET
From the magnificent Milky Way to a tribute to Leonard Nimoy, don't miss these stunning space images.
14 August 2015, 05:22 PM ET
It's been a wild 2015 for United States weather, and more changes are afoot when El Niño takes hold in the Pacific, NASA said.
14 August 2015, 02:43 PM ET
If you see a magnetar, don't pick it up.