25 September 2013, 01:01 AM ET
It’s like watching siblings tussle: Astronomers have finally witnessed a long-sought example of pulsar evolution. Designated PSR J1824-2452I, this X-ray Binary is being spun up to millisecond speeds by a tiny companion, 1/5th the Sun’s mass.
25 September 2013, 12:00 AM ET
A beautiful spiral galaxy in Coma Berenices bares its long arms.
24 September 2013, 06:02 PM ET
The 1-ton Curiosity rover paused to examine a few rocks late last week, making the first of five planned science stops en route to the 3.4-mile-high Mount Sharp. The break was fruitful, returning further signs of long-ago flowing water.
24 September 2013, 06:01 PM ET
Science fiction seems to possess an uncanny ability to predict the future. Jules Verne foretold rocket ships and submarines, H.G. Wells predicted the atomic bomb, and Arthur C. Clarke gave us satellites and online newspapers.
24 September 2013, 05:03 PM ET
Procyon is a binary system, with a main-sequence larger star and a smaller white dwarf star orbiting each other.
24 September 2013, 02:53 PM ET
Comet ISON, discovered by two amateur astronomers in Russia, will arrive in Earth's neighborhood in November 2013.
24 September 2013, 02:33 PM ET
NASA's public outreach program is looking for innovative ideas of locating hidden asteroids that lurk around our world. SPACE.com caught up with NASA's Andrew Filo at their Maker Faire booth.
24 September 2013, 02:00 PM ET
After more than five years of testing, NASA's Evolutionary Xenon Thruster ion engine has set a new duration record. The project completed a continuous test the ion engine for more than 48,000 hours — over five and a half years.
24 September 2013, 01:26 PM ET
A fleet of spacecraft is gearing up to track the potentially dazzling Comet ISON as it flies by Mars next week. The comet will fly by Mars at a range of 6.5 million miles between Sept. 29 and Oct. 2.
24 September 2013, 01:12 PM ET
The glowing jumble of gas clouds visible in this stunning space wallpaper make up a huge stellar nursery nicknamed the Prawn Nebula.
24 September 2013, 12:58 PM ET
NASA astronaut Chris Cassidy is getting used to life with gravity again after five months aboard the International Space Station. In an interview with SPACE.com, he reflected on his stay, his harrowing spacewalk and the prospect of longer missions.
24 September 2013, 12:09 PM ET
As the comet approaches its date with the Sun (Nov. 28th, 2013), it brightness is growing in magnitude. This has opened the door to backyard astronomers with smaller telescopes to glimpse the possible 'Comet of the Century'.
24 September 2013, 11:56 AM ET
Slooh.com's Canary Islands Observatory captured asteroid 433 Eros seeming to fly with Comet ISON on September 24th, 2013. This 2nd largest near-Earth asteroid – which has been visited by the NEAR probe – is traveling faster, along a different orbit.
24 September 2013, 11:18 AM ET
Bill Nye the Science Guy is bringing his weird brand of science to a popular TV show and, so far, it seems to be paying off.
24 September 2013, 10:52 AM ET
The first and only envelope to be postmarked on the surface of the moon is now on display as part of the world's largest postage stamp gallery.
24 September 2013, 10:24 AM ET
The hot laboratory viewed from inside as an engineer uses the manipulator arms.
24 September 2013, 09:00 AM ET
The Kavli Foundation will host a webcast about the mysterious forces at work within a black hole on Wednesday (Sept. 25) beginning at 3 p.m. EDT (1900 GMT).
24 September 2013, 07:01 AM ET
Sick astronauts could conceivably have been infected on Mars, some parts of which may be capable of supporting life as we know it. So the world may be reluctant to welcome such travelers home, leery of unleashing an alien superplague on Earth.
24 September 2013, 06:37 AM ET
See amazing images by dedicated night sky observers and amateur astronomers alike.
23 September 2013, 08:24 PM ET
Deneb, one of the three stars of the Summer Triangle, anchors the tail of Cygnus the Swan.
23 September 2013, 06:55 PM ET
EchoBeach will study exoplanets from a hot air balloon, on the cheap.
23 September 2013, 05:40 PM ET
With a new season comes a new sky. The passing of the autumn equinox means that the days are beginning to shorten and weather is becoming colder for people in the Northern Hemisphere, but that isn't all that's changing.
23 September 2013, 03:37 PM ET
The footprint of an ancient impact site in what is now the Chesapeake Bay shows how meteor strikes not only affected Earth's past, but continue to affect the world today.
23 September 2013, 02:45 PM ET
North Korea probably tested a long-range rocket in late August, new reports suggest.
23 September 2013, 02:07 PM ET
The Coma Cluster of galaxies' hot gas arms, spanning at least a 1/2 million light years, have been unveiled by combining images from the Chandra and XMM-Newton x-ray Observatories. They're a byproduct of smaller galaxies merging with the cluster.
23 September 2013, 02:05 PM ET
Recently returned to Earth NASA astronaut Chris Cassidy talks to SPACE.com's Megan Gannon about science, exercise and EVA's on his tour of duty aboard the International Space Station.
23 September 2013, 02:00 PM ET
See photos of the comet C/2012 S1 (ISON), or Comet ISON, which could amaze the world in late 2013.
23 September 2013, 11:56 AM ET
A California-based company that will launch a 3D printer to the International Space Station in 2014 is aiming to change the way space agencies think about how they transport goods to the orbiting outpost.
23 September 2013, 11:40 AM ET
A private robotic ship bound for the International Space Station is going to have to wait it out in space until at least Saturday (Sept. 28) before delivering its cargo to the orbiting laboratory.
23 September 2013, 11:23 AM ET
Researchers at NASA's Dryden Flight Research Center have photographed F-15 and F/A 18 aircraft pass between cameras and the Sun. Imagery of interrupted air flow density around the aircraft can help minimize sonic booms and aircraft stress.
23 September 2013, 11:17 AM ET
The European Space Agency's gravity-mapping GOCE satellite will begin falling from space in mid-October as it runs out of fuel, following a successful four-year mission. The GOCE satellite measured Earth's gravity in unprecedented detail and generated gra
23 September 2013, 10:48 AM ET
NASA astronaut Karen Nyberg demonstrates how the COLBERT treadmill works on the International Space Station.
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