12 years of W.M. Keck Observatory imagery of star system HR 8799 have been time-lapsed. The system hosts four planets that are more massive than Jupiter. Mike Rowe warns of troubling trend among ...

This week is the best time in May to view the night sky. Here's everything you can see during May's dark skies, from an ...

Spanning approximately 220,000 light-years across, the Andromeda Galaxy is the largest galaxy of the Local Group, which also contains the Milky Way.

It’s been called a “discovery machine” and a new way of doing astronomy ... an object—the universe in time-lapse. The list of transient events includes stars that eclipse each other ...

Auroras are natural light displays that occur when charged particles from the sun interact with Earth’s magnetic field and ...