New research shows how the star's powerful outbursts could help scientists assess which worlds might support life.

Astronomers have discovered 2017 OF21, a mysterious dwarf planet in the solar system's frozen outskirts. This video explores ...

The Geminids return with near-perfect viewing conditions, offering skywatchers up to 150 meteors an hour under dark December ...

For every rule in the cosmos, there is a spectacular exception. While most planets orbit in a neat plane, Pluto tumbles at a ...