For decades, astronomers have searched for signs of extraterrestrial intelligence using radio telescopes and optical ...

Researchers may have finally cracked the age-old mystery about the origins of Earth's water, and the answer might be related ...

On August 24, 2006, Pluto ceased to be considered a planet. A mixture of rock and ice located in the Kuiper Belt, a region of icy objects beyond the orbit of Neptune. This demotion ...

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many ...

A mystery object tearing towards Earth at break-neck speed has raised fears that aliens are on their way here.

Astronomers note Mercury is often difficult to see. Even Copernicus reportedly never observed it. Its proximity to the sun usually hides it, requiring careful timing for observation.

The Solar System has a total of 419 known moons around planets. If we count dwarf planets, asteroids, and other worlds, the ...

New data from the James Webb telescope suggests that Bennu and Ryugu — two asteroids recently visited by sample-return ...