04 August 2015, 04:15 PM ET
An icy moon of Saturn has mysterious red arcs of material crisscrossing its surface — and no one knows exactly how they got there.
04 August 2015, 03:43 PM ET
The new image captures the satellites Dione and Mimas, with Saturn a blurry behemoth looming in the background. Sunlight is hitting the moons at such an angle that they seem to be staring up at the ringed planet.
04 August 2015, 03:16 PM ET
As NASA gears up for the launch of its next great space telescope in 2018, a model-making team is asking for help to create miniature versions of the huge observatory for public outreach.
04 August 2015, 10:39 AM ET
The Mars Science Laboratory's investigation of Gale Crater and its central peak Mt. Sharp has revealed a geology prominently shaped by liquid flows.
04 August 2015, 09:32 AM ET
Channels "carved into the steep-sided walls" of canyons in Mars’ Atlantis Chaos lowland plains, suggest vast amounts of water once flowed here. The Mars Express High Resolution Stereo Camera snapped cliffs, impact craters, basins weathered hills..
04 August 2015, 07:30 AM ET
The New Horizons spacecraft's flyby of Pluto on July 14 is revolutionizing researchers' understanding of the faraway dwarf planet. The epic encounter could also help spur future ambitious exploration missions, mission team members say.
04 August 2015, 07:04 AM ET
NASA's Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer spacecraft, or OSIRIS-REx, is progressing through assembly, test and launch operations (ATLO) at a Lockheed Martin Space Systems Company facility in Denver.
04 August 2015, 07:01 AM ET
Undergraduate students at San Jose State University have identified the two densest galaxies ever found — and a new video simulation depicts how such tiny, dense groups of stars might form and encompass an oversize black hole.
03 August 2015, 05:56 PM ET
After an accidental fire in December ripped apart The Mars Society's greenhouse at a facility in rural Utah, the group is asking the public to help raise money for a new one.
03 August 2015, 05:16 PM ET
NASA has selected three finalists for its next Small Explorer astrophysics mission and two finalists for the even smaller Explorer Missions of Opportunity Line, the U.S. space agency said July 30,
03 August 2015, 04:24 PM ET
The Perseid's peak On Aug.13th, and the lack of moonlight creates the possibility of seeing up to 100 meteors per hour. All eight planets are visible and with a telescope, former planet Pluto, Ceres, Vesta, Juno and Pallas can be spotted.
03 August 2015, 04:02 PM ET
The team behind NASA's New Horizons mission, which performed the first-ever Pluto flyby last month, has named some Charon craters after characters from the "Star Wars" and "Star Trek" franchises, including Darth Vader and Capt. James T. Kirk.
03 August 2015, 10:17 AM ET
Enormous stars collapse in ultramassive supernova explosions — now in 3D! For the first time ever, researchers have turned back the clock on a star's final moments to simulate how wrinkles in its violent collapse trigger a vast explosion.
03 August 2015, 07:00 AM ET
Climate modelers go back in time to simulate past Snowball Earth conditions and find that complete freeze-over is hard to achieve.
03 August 2015, 06:59 AM ET
Astronomers from all over the world are gathering in Honolulu, Hawaii, to discuss the most cutting edge space science around. Members of the public can join the scientists for talks and stargazing events.
03 August 2015, 06:38 AM ET
Signs life on planets outside our solar system could be found in exoplanet atmospheres, but possible "false positives" are making scientists cautious.
02 August 2015, 02:18 PM ET
An alien aurora 1 million times brighter than Earth's, robots building a moon telescope, a $5.5 billion asteroid and more in Space.com's top news stories of the week.
31 July 2015, 06:55 PM ET
From an amazing view of Africa from space to a tint galaxy bursting with stars, don't miss these stunning space images.
31 July 2015, 06:00 PM ET
Could we actually be living in the Matrix? You might be surprised.
31 July 2015, 05:19 PM ET
A 16-year-old New York City-area student will one day see her DNA experiment launched to the International Space Station. The experiment was designed by Anna-Sophia Boguraev of Bedford, New York.
31 July 2015, 03:25 PM ET
Asteroid 1999 JD6's nearest approach to Earth was ~4.5 millions miles away but it was close enough for radar images to be captured. The object is a "contact binary consisting of two lobes," according to NASA's Jet Propulsion Laboratory.
31 July 2015, 03:10 PM ET
The ashy peak of a volcano stands out amid a snowy scene, hinting at a recent eruption, in newly released images from NASA.
31 July 2015, 09:34 AM ET
Planet HD 219134b was detected using NASA's Spitzer Space Telescope. It resides 21 light-years away in the Cassiopeia constellation and its star is visible from Earth. The planet orbits too close to its star to support life.
31 July 2015, 08:40 AM ET
For the next six months, NASA's Saturn-orbiting Cassini spacecraft will get its final look at two icy moons -- one famous and one not so well-known -- before preparing for mission's end in 2017.
31 July 2015, 07:00 AM ET
NASA's Hubble Space Telescope and the Keck Observatory in Hawaii have helped researchers characterize a Uranus-mass exoplanet that had remained mysterious since its discovery a decade ago.
31 July 2015, 06:00 AM ET
Scientists with the SETI (Search for Extraterrestrial Intelligence) Institute have already begun targeting Earth's older cousin, Kepler 452b, the first near-Earth sized world found in the habitable zone of a sun-like star.
31 July 2015, 12:20 AM ET
Earth's magnetic field, which protects the planet from harmful blasts of solar radiation, is much older than scientists had previously thought, researchers say.
30 July 2015, 06:15 PM ET
The alien planet, called HD 219134b, is about 4.5 times more massive than Earth, making it a so-called "super Earth." HD 219134b lies extremely close to its host star, completing one orbit every three days, so its surface is too hot to harbor life.
30 July 2015, 05:25 PM ET
A wisp of a galaxy is rich with new, blue-white young stars and primordial gas in this new cosmic photo from the Hubble Space Telescope. The irregular dwarf galaxy is creating stars the size of our sun at a prodigious rate of about once a year.
30 July 2015, 05:24 PM ET
This month the European Space Agency took a major step closer to an ambitious exploration of Jupiter and its icy moons.
30 July 2015, 04:06 PM ET
This gorgeous satellite view of the busy Big Apple as seen from orbit offers a glimpse into the new 'My Planet From Space' exhibit currently underway at the United Nations.
30 July 2015, 03:35 PM ET
Despite its tranquil-sounding name, new imagery from the Hubble Space Telescope reveals a dusty nebula shaped by "intense winds from hot stars, churning funnels of gas, and energetic star formation.” It is located in the Sagittarius constellation.