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.
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.
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, 12:56 PM ET
Jupiter and the moon are set to meet up in the early morning sky on Saturday (Oct. 18).
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
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, 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, 03:45 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, 10:04 AM ET
ESA's Optical Ground Station (OGS) at the Teide Observatory in Spain, shot a 3.6 Watt 532-nm laser at the ISS, giving a a greenish glow. The laser was used to test optical communication tech.
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.
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.