Aliens may have been closer to Earth than first thought. New research from NASA reveals that Ceres, the dwarf planet in the ...

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

A dwarf planet in our own solar system may once have been habitable, new Nasa research has revealed. Ceres, which lies ...

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

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 ...

A billion or so years into its evolution, the icy dwarf planet Ceres may have had the right conditions to sustain life, which ...

Dwarf planet Pluto, by comparison, is six times as wide. Sheppard has embarked on an ongoing survey to find tiny planetoids on the solar system's outer rim.

A large asteroid could be reclassified as a dwarf planet – which could make it the smallest in the solar system – after new research revealed its shape, astronomers said on Monday.

Dwarf planet Pluto, by comparison, is six times as wide. Sheppard has embarked on an ongoing survey to find tiny planetoids on the solar system’s outer rim.