The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

Traveling from one star to another is currently impossible to achieve within a human lifetime. But some projects are ...

Pluto likely acquired large moon Charon in a “kiss and capture” collision billions of years ago. It may have created a ...

The fastest-spinning white dwarf ever discovered is a shrinking cosmic vampire feasting on a stellar companion. A feeding process is pushing the dead star toward an imminent supernova explosion.

The wolf moon is seen in 2023 rising over the Atlantic Ocean on Friday, Jan. 6, 2023 in Stuart, Florida. The year's first ...