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 ...

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

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

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 ...

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

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

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

New Moon occurs this morning at 8:47 A.M. EDT. The planet Mercury is now becoming visible, low in the evening sky. If you have a clear view southwest, you may catch the planet some 30 minutes ...

November brings many sights to explore, including Mercury in the early evening, Mars brightening, and the giant planets Jupiter and Saturn adding to the spectacle. Jupiter in particular is ...