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 ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

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

Learn how rock and dust samples are shedding light on the origins of Asteroid Bennu and the history of the early Solar System ...

All solar system planets circle our sun with slightly tilted orbits — and a new study shows even distant planetary systems in quiet neighborhoods have orbital tilts, too.

Asteroids floating through our solar system are debris left over from when our planetary neighborhood formed 4.6 billion ...

Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', ...

Beyond the familiar planets lies a fascinating frontier filled with icy worlds, mysterious orbits, and cosmic curiosities.

The new image, which shows Earth along with an even smaller point of light coming from the moon, harkens back to Carl Sagan's ...

These tiny spheres were formed under extreme conditions during the early solar system's chaotic environment. The study conducted by Japan’s Nagoya University and the Italian National Institute for ...