Turn that frown upside down.

As much as Steven Spielberg likes aliens, he seems to prefer holding them at arm’s length. The creatures in Close Encounters ...

The Tiangong space station approaches Tycho Crater in stunning amateur transit footage.

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...

A spent SpaceX Falcon 9 upper stage is set to impact the moon this August, but experts aren't sure if the crash will be ...