Cosmology

An incomplete version of Chile's ALMA telescope array found that star formation was in full swing earlier than had been thought. John Matson reports

A study of the star HD 140283, only about 190 light-years away from us, finds that it formed in short order after the big bang. John Matson reports

The upcoming cosmic spectacle should offer scientists a chance to test some of their theories about how black holes accrete mass

NASA's Mars Reconnaissance Orbiter used radar to find the underground Martian channels

Although unlikely, there is a small chance the Comet Siding Spring, an estimated eight to 50 kilometers in diameter, could collide with Mars in October 2014

All stars are born in groups but then slowly disperse into space. A new theory seeks to explain how these groups form and fall apart or, in rare cases, persist for hundreds of millions of years

Theoretical physicist and New York University professor Matthew Kleban answers viewer questions submitted to YouTube's Spacelab Channel

The discovery could help astronomers better understand how these behemoths grow

NASA’s Solar Dynamic Observatory captures video of superheated plasma loops far larger than Earth as they rain down on solar surface

Rocketing through space at more than three million kilometers per hour, six speedy stars were likely ejected from the giant black hole in the center of the Milky Way

Spend a little more time observing meteors or combating climate change, spend a little less time worrying about global catastrophes. David Biello reports

Water on the moon was there as the moon formed, not delivered later by solar wind and comets