19 October 2014, 09:02 AM ET
A comet from the outer reaches of the solar system is due to give Mars a close shave on Sunday (Oct. 19), and you can watch the flyby live online.
19 October 2014, 09:00 AM ET
An large sunspot (AR2192) emitted a X1-class solar flare on October 19th, 2014. NASA's Solar Dynamics Observatory captured the fireworks. The blast site was not Earth-directed.
18 October 2014, 09:11 PM ET
NASA scientist Dr. Michelle L Thaller tells Space.com's @MiriKramer what you need to know about comet Siding Spring's fly-by, its implications for the Red Planet and how humans will be able to observe it. Full Coverage: http://goo.gl/0cnCEb
18 October 2014, 08:53 AM ET
The unmanned, reusable space plane landed at the Air Force Base in Californoa on October 17th, 2014. The Orbital Test Vehicle mission 3 (OTV-3) spent 22 months in space on a secret mission. Full Story: http://goo.gl/yDm3Ai
18 October 2014, 07:01 AM ET
Comet Siding Spring — unknown and undiscovered until 2013 — will zoom past the Red Planet Sunday afternoon (Oct. 19) in an encounter that could help scientists better understand how the solar system came to be.
17 October 2014, 05:27 PM ET
ESA officials are asking the public to come up with a better name for the spot on Comet 67P/Churyumov-Gerasimenko where the Rosetta mission will drop a lander during a historic, unprecedented maneuver on Nov. 12.
17 October 2014, 04:31 PM ET
NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, has selected proposals from 10 universities to begin investigating the possible use of cubesats as auxiliary components to missions to Europa and beyond.
17 October 2014, 11:03 AM ET
A spacecraft exploring the Saturn system was zapped by static electricity sent out one of the ringed wonder's many moons in 2005, a new study suggests.
17 October 2014, 08:00 AM ET
See news, images and videos about comets, icy wanderers in the solar system.
17 October 2014, 07:38 AM ET
In a rare celestial event, a comet will pass closer to Mars than the moon is from Earth on Oct. 19, 2014. See how the Comet Siding Spring flyby of Mars works in this Space.com infographic.
17 October 2014, 07:30 AM ET
Comet Siding Spring will zoom within 87,000 miles of Mars at 2:27 p.m. EDT on Sunday (Oct. 19). Scientists will observe the flyby using the fleet of spacecraft already at Mars, studying the comet and any effects its dust has on the planet's atmosphere.
16 October 2014, 07:00 PM ET
Comet Siding Spring C/2013 A1 will fly within 87,000 miles of the surface of the Red Planet, causing NASA to alter the positions of their satellite fleet to evade the debris.
16 October 2014, 03:06 PM ET
Experts will debate whether or not life is likely to exist on planets orbiting red dwarf stars during a live event tonight. Watch it here at Space.com.
16 October 2014, 02:13 PM ET
A NASA probe has peered into the sun's atmosphere and found 'bombs' of plasma, jets that affect solar wind and nanoflares that rapidly accelerate particles.
16 October 2014, 02:10 PM ET
There's something strange going on below the surface of Saturn's Death Star-looking moon Mimas, a new study suggests.
16 October 2014, 02:03 PM ET
Instruments aboard NASA's Interface Region Imaging Spectrograph (IRIS) spacecraft have delivered imagery of super heated plasma and jets in a hard-to-study region of the Sun's atmosphere.
16 October 2014, 02:35 AM ET
World Space Week is one of a series of events co-ordinated by the UN to celebrate the global nature of space exploration. It was established in 1999.
16 October 2014, 12:35 AM ET
This vivid space wallpaper resembles an abstract painting, or perhaps a contemporary stained-glass window. But it is actually an unusual view of a galaxy taken with the new MUSE instrument on ESO’s Very Large Telescope.
15 October 2014, 07:13 PM ET
The NOAA Goes-East satellite has beamed down imagery of the Category 4 storm moving over the Atlantic Ocean. On October 15th, the National Hurricane Center reported winds reaching 130 mph coming from the storm.
15 October 2014, 05:54 PM ET
The images, taken by NASA's MESSENGER spacecraft, suggest that the ice lurking within Mercury's polar craters was delivered recently, and may even be topped up by processes that continue today, researchers said.
15 October 2014, 02:43 PM ET
Hubble has spotted three objects that the New Horizons probe could potentially visit after completing its Pluto flyby in July 2015. One of these newly identified bodies is definitely reachable, while the other two require further study.
15 October 2014, 01:49 PM ET
NASA's Messenger spacecraft is the first dedicated to orbiting Mercury, the solar system's innermost planet.
15 October 2014, 01:05 PM ET
Star formation in the early universe may not have been as plentiful as it is today.
15 October 2014, 12:03 PM ET
With an icy comet lurking just over its shoulder, a far-flung European spacecraft snapped a selfie in outer space.
15 October 2014, 09:16 AM ET
Astronomers peering onto the early Universe with Chile’s APEX are seeing star-birth in unexpected parts of this by long-studied proto-cluster, formerly called MRC-1138-262; the ‘Spiderweb galaxy.’This artistic impression is drawn from their finding
15 October 2014, 07:50 AM ET
An excerpt from Marc Kaufman's "Mars Up Close: Inside the Curiosity Mission," which was published in August 2014 by National Geographic.
14 October 2014, 05:49 PM ET
At first glance you'd be forgiven for thinking NASA's Mars rover Curiosity had stumbled across a wind-rippled lake or sea at the base of Mount Sharp.
14 October 2014, 05:33 PM ET
NASA's MAVEN Mars orbiter has been busy since it arrived at the Red Planet late last month, collecting detailed data about Mars' upper atmosphere.
14 October 2014, 12:49 PM ET
Boo! An amazing new photo taken by a NASA spacecraft seems to show the sun with creepy jack-o-lantern grin just in time for Halloween.
14 October 2014, 07:37 AM ET
Scientists previously thought that the moon's volcanic activity died down a billion years ago. But new data from NASA's Lunar Reconnaissance Orbiter, or LRO, hints that lunar lava flowed much more recently, perhaps less than 100 million years ago.
14 October 2014, 07:00 AM ET
The upcoming launch, expected to take place Oct. 23 from China's Xichang Satellite Launch Center, will apparently send an experimental, recoverable probe to lunar orbit and back to validate tech needed for a lunar sample-return mission.
14 October 2014, 07:00 AM ET
Models using a century-old equation suggest that the Milky Way contains only half the dark matter than scientists had previously thought.