A six-mile-thick crust of methane trapped in water ice could explain many of the saturnian moon's weird properties ...

Rainbows don’t actually exist. You can’t find the end of a rainbow (or its attendant pot of gold). It’s not possible to walk ...

A third, tenuously held companion to the known binary V404 Cygni may signal that at least some black holes form "gently." ...

NASA has identified nine locations near the Moon’s south pole for the first crewed lunar landing since Apollo 17.

The closest star to Earth is also the best studied, but only recently have we truly begun to uncover its secrets.

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

Scientists are relieved by the observatory’s stay of execution, but concerned that some budget cuts have gutted future ...

Mars’ features are starting to become visible, Mercury appears in the evening sky, and the Trifid Nebula glows in the sky ...

Computerized telescope mounts and plate-solving software make it easy to return to the same celestial location every night.

Astronauts have voted from the space station since 1997 and have cast ballots in nearly every U.S. presidential election ...

Neither candidate has talked much about space policy on the campaign trail, but both have records to consider.