20 August 2015, 02:01 PM ET
Two experiments on Earth are helping to shine light on the hidden characteristics of dark energy and dark matter, elusive phenomena that make up nearly 95 percent of the universe but remains hidden from direct detection.
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, 10:25 AM 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.
20 August 2015, 07:57 AM ET
NASA ordered two more cargo deliveries to the International Space Station from Orbital ATK under a 2008 Commercial Resupply Services (CRS) contract, a company spokeswoman said Aug. 12.
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, 05:34 PM ET
Journalist Stephen Petranek thinks living on Mars is far more than science fiction — he believes it will happen within the next 20 years.
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, 04:00 PM ET
After spending 199 days on the International Space Station, a European astronaut is readying for her next big mission: joining an independent "Star Trek" production.
19 August 2015, 03:37 PM ET
ESA’s Rosetta probe is keeping a sharp eye on comet 67P/Churyumov-Gerasimenko during its perihelion (closest approach to the Sun and peak activity time).
19 August 2015, 03:11 PM ET
Matt Damon's character in the new movie gets stranded on the Red Planet and has to "science the sh*t" out of the problem. He hopes that movies like this will help to propel people into learning more about science.
19 August 2015, 01:07 PM ET
To prepare for the film the actress worked with NASA to learn about the realistic aspects of space exploration. Chastain and NASA astronaut Tracy Caldwell Dyson explain.
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, 10:37 AM ET
The second trailer for the new movie starring Matt Damon, Jessica Chastain, Kristen Wiig and more shows a deeper look at being stranded on Mars and the politics of a rescue mission.
19 August 2015, 10:27 AM ET
Call all fans of flight! According to NASA, it's National Aviation Day today (Aug. 19) and the space agency wants you to celebrate the technological marvel that is flight with a photo social media campaign.
19 August 2015, 10:22 AM ET
A summer challenge invites kids ages 2 to 8 to develop "out-of-this-world" creations — with a grand-prize trip to a SpaceX rocket launch.
19 August 2015, 08:00 AM ET
Japan's fifth H-II Transfer Vehicle (HTV-5) blasted off atop an HII-B rocket from Tanegashima Space Center today (Aug. 19) at 7:50 a.m. EDT (1150 GMT, 8:50 p.m. local Japanese time).
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, 05:40 AM ET
On Thursday morning (Aug. 20), skygazers will get a special treat, when the planet Mars appears in the midst of hundreds of stars: the open star cluster known as the Beehive, Praesepe, or Messier 44.
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.
19 August 2015, 01:21 AM ET
A Lagrange point is a location in space where the interaction between gravitational and orbital forces creates a region of equilibrium where spacecraft can maintain constant orbits.
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, 04:30 PM ET
If the USS Enterprise from "Star Trek" raced the ship from "Battlestar Galactica" to the nearest star system, which would get there first?
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