"Something strange is happening on the outskirts of our Solar System. It could be a large ...

Hot spots and tunnels to neighboring "superbubbles" seem to have been created by supernovas and infant star outbursts.

Hale-Bopp originated in the Oort Cloud, a theoretical shell of icy planetesimals surrounding the sun in the outer reaches of ...

Written by the former chief historian of NASA, the book examines the evolution of our cosmic understanding—from early civilizations to the present day ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

The farthest spacecraft in the universe went momentarily rogue, but scientists breathed a sigh of relief when it reconnected ...

You’d need 1.3 million Earths to fill up the volume of the Sun. Our Sun is so big it makes up over 99% of the mass of our ...

Hollywood has made a cottage industry out of imagining biological space aliens, but if intelligent life is out there it’s ...

The smooth, planet-less disk of the Vega star system challenges planetary formation theories, suggesting alternative cosmic ...

A century ago this month, a brash astronomer leaked a discovery that opened our view to the cosmic distance scale and the ...

NASA has released a new edition of Issue 4 of the Astrobiology Graphic History series. The issue now includes NASA's Europa ...

Scientists have identified one of the largest carbon-based molecules in space yet. It could help us decode the origins of ...