Space News

A comet the size of a small mountain is about to skim past Mars, and NASA hopes its spacecraft will be able to photograph the once-in-a-million-years encounter.

A comet the size of a small mountain whizzed past Mars on Sunday, dazzling space enthusiasts with the once-in-a-million-years encounter.

Last week's lunar eclipse wasn't just a show for Earthlings, NASA's MESSENGER mission was also watching from Mercury, 66 million miles away.

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 Plan...

All eyes on Mars--robotic or otherwise--were focused toward a comet the size of a small mountain set to whiz past the Red Planet on Sunday.

Astrophotographer Damian Peach shares this spectacular image of comet C/2013 A1 Siding Spring approaching Mars taken just hours ago. The faint comet shows a small, condensed coma and bent tail against the glaring orange ...

As climate change continues to hammer Arctic sea ice, pushing back its summertime boundaries to record-high latitudes, NASA is flying an innovative airborne mission to find out how these developments will affect worldwid...

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.

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.

Comet Siding Spring will pass close to Mars today, Sunday, October 19, at 18:32 UTC. The comet will come within 139,500 km (87,000 miles) of the Red Planet, which is sixteen times closer to Mars than any known comet has ...

On Oct. 16, 2014, a redditor by the handle -545- was camping at the Ashton-Wildwood County Park in Iowa. He spotted a clearing in the trees near his campsite which framed a part of the sky, so he set his camera up to tak...

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: ...