For only the third time in history, astronomers have detected a new interstellar visitor — an object from another star — blitzing into our solar system.

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Admire our galaxy’s dramatic galactic core—a sparkly bulge of stars and gas—while summer’s short ‘Milky Way season’ lasts ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

The Milky Way's core will be visible this month and through August. Here's what Tennessee stargazers should know.