17 October 2014, 08:00 AM ET
See news, images and videos about comets, icy wanderers in the solar system.
17 October 2014, 07:30 AM ET
Forty-six years ago this week, NASA's first Apollo astronauts to launch into space were circling the Earth, just as the crew's mission patch depicted. The official insignia though, was not what the crew initially envisioned as representing their flight.
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.
17 October 2014, 03:02 AM ET
An Ariane 5 launcher fired into space Thursday (Oct. 16) from French Guiana, hauling two commercial satellites destined to broadcast television to Latin America for Intelsat, DirecTV and Argentina's national telecom company.
16 October 2014, 03:45 PM ET
Sierra Nevada Corp. filed suit in federal court Oct. 15, seeking to overturn a NASA decision to lift a stop-work order on contracts it awarded to Boeing and SpaceX.
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, 01:35 PM ET
India on Oct. 16 successfully launched the third of seven planned satellites for its Indian Regional Navigation Satellite System (IRNSS), which is expected to be fully operational in 2015.
16 October 2014, 09:52 AM ET
Space travelers from around the globe recently got a firsthand sense of China's blossoming plans to explore Earth orbit and beyond.
16 October 2014, 07:13 AM ET
Millions of people across North America will have a chance to observe a partial solar eclipse next week, weather permitting.
16 October 2014, 07:00 AM ET
A new analysis has pinpointed a few purported problems with the blueprint laid out by the Netherlands-based nonprofit Mars One, which aims to land four people on the Red Planet in 2025 as the vanguard of a permanent settlement.
16 October 2014, 07:00 AM ET
Orbital Sciences' Cygnus spacecraft was scheduled to launch on a cargo run to the station on Oct. 24. But that liftoff has been delayed until at least Oct. 27, because Hurricane Gonzalo could affect a tracking station for Cygnus' Antares rocket.
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, 05:30 PM ET
A comet is on course for a super-close approach with the planet Mars this Sunday (Oct. 19) in a rare celestial encounter. If you have a moderate-size telescope, you might be able to spot the icy wanderer as it nears the Red Planet, weather permitting.
15 October 2014, 03:30 PM ET
Two NASA astronauts working outside the International Space Station raced against the clock during a spacewalk today (Oct. 15).
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, 02:09 PM ET
See photos of NASA astronauts Reid Wiseman and Barry "Butch" Wilmore taking a spacewalk outside the International Space Station on Oct. 15, 2014.
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, 01:17 PM ET
The Indian Space Research Organization's Mars Orbiting Mission (MOM) captured imagery of the tiny moon transiting the Red Planet In October 2014.
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, 10:31 AM ET
See amazing images by dedicated night sky observers and amateur astronomers alike.
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.
15 October 2014, 06:41 AM ET
Two NASA astronauts will venture into the vacuum of space for a spacewalk on the outside of the International Space Station today (Oct. 15), and anyone with an Internet connection can watch it live online.
14 October 2014, 11:51 PM ET
In this space wallpaper, sitting atop Cerro Paranal high above the Atacama Desert in Chile, two of the Very Large Telescope's Unit Telescopes quietly bask in the starlight, observing the Milky Way as it arches over ESO's Paranal Observatory.
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, 03:28 PM ET
Canadian astronaut Chris Hadfield shares his favorite images of Earth from space in a new book, "You Are Here: Around the World in 92 Minutes."
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.