The moon is Earth's longtime, familiar companion, the story of when and how it got there is actually a bit of an unanswered question in astronomy.

The fact that you can't breathe on the moon probably isn't surprising. That said, the moon does have an atmosphere; it's just very different than Earth's.

Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...

There's a lot less sky and a lot more moon in view for Firefly Aerospace's "Ghost Riders in the Sky" mission.

The close encounter was "a historic first of its type for a Japanese private, commercial lunar lander," according to ispace.

An international team of engineers and space scientists has used a variety of assumptions, techniques, and math principles to ...