19 October 2014, 02:30 PM ET
Comet Siding Spring came within just 87,000 miles of the Martian surface at 2:27 p.m. EDT today — about one-third of the distance between Earth and the moon. The comet barreled by at 126,000 mph relative to the Red Planet, NASA officials said.
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.
18 October 2014, 02:01 AM ET
See photos of the third mission flown by the US Air Force's secret space plane, the X-37B.
18 October 2014, 12:38 AM ET
The U.S. Air Force landed its mysterious X-37B space plane at Vandenberg Air Force Base in California on Oct. 17, 2014. See photos of the X-37B spacecraft's landing here.
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, 04:27 PM ET
The private spaceflight company Virgin Galactic will soon begin a new round of rocket-powered test flights of the commercial spaceliner SpaceShipTwo to prepare for eventual passenger flights to space.
17 October 2014, 02:18 PM ET
The X-37B touched down at California's Vandenberg Air Force Base on Friday (Oct. 17), ending a space mission that kicked off in December 2012 and saw the unmanned vehicle circle Earth for an unprecedented 675 days.
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, 07:30 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, 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, 07:00 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, 05:27 PM ET
In August 2014, ESA's Rosetta Spacecraft will rendezvous with Comet 67P/Churyumov-Gerasimenko and deploy the Philae lander. See photos from the Rosetta comet probe.
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, 01:17 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, 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, 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, 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, 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.
13 October 2014, 05:46 PM ET
The first meeting of 'The Astronaut Wives Club' — the made-for-TV-version, that is — has convened in New Orleans. Filming has begun on the 10-episode ABC series, which tells the real story of the women who stood beside the United States' first spacemen.
13 October 2014, 05:20 PM ET
Rosetta team members have named the 82-foot-tall boulder on Comet 67P/Churyumov-Gerasimenko "Cheops," after the largest pyramid in Egypt's famous Giza complex.
13 October 2014, 02:04 PM ET
NASA needs your help to name a new robot, and you could win some money doing it.
13 October 2014, 07:00 AM ET
Comet Siding Spring, also known as C/2013 A1, will miss the Red Planet by just 87,000 miles (140,000 kilometers) at 2:27 p.m. EDT (1827 GMT) Sunday. For comparison, the moon orbits Earth at an average distance of 239,000 miles (384,600 km).