A four-planet system reveals remarkable insights about how planets form and how they change during their lifetime.

New calculations reported by Live Science indicate Jupiter was once much larger and is still contracting as it cools, offering constraints on early solar system conditions.

What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

This composite image was weeks in the making, as Horálek’s two "crossings" happened months apart. Mars traced its path ...

Astronomers have discovered a new type of object that is a starless cloud that failed to form as a galaxy. Here's what to ...

The University of Wyoming Harry C. Vaughan Planetarium will offer a varied plethora of programming to start off the new year.

The satellite, aboard a SpaceX rocket that could lift off as early as this Sunday, is set to help reveal details about ...

NASA’s Hubble has examined Cloud-9, a strange object with no stars that offers clues about early galaxy formation and dark ...