New research sheds light on how a pair of unusual black holes may have been able to keep their companion stars alive — and at a distance.

Averting your gaze when viewing the ringed planet can cause an optical phenomenon that might make you think twice about what ...

Insulation provided by carbon dioxide ice above the martian polar caps could explain many of the Red Planet’s ancient river ...

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

Every constellation has something within its borders worth tracking down, if you just look hard enough. Here are five to start with.

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

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

Rainbows may be a trick of the eye, but they’re also based in fascinating optical physics. Here's how they work and why we see them.

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

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

Azimuth tells us where the comet is ... and send your photos to [email protected] — we’ll feature the best ones on the website and perhaps in the magazine.

In this episode, Dave Eicher invites you to observe the Moon as it closely passes the Ringed Planet on the evening of ...