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.

Two of the objects in the arrangement are cold brown dwarfs, which will serve as a benchmark for others throughout the Milky ...

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

Astronomers report the finding of a unique new object that doesn’t fit with categories that were only established in the last ...

Astronomers have discovered a rare quadruple star system with two red dwarfs and two brown dwarfs orbiting together.

A rare white dwarf merger remnant emerges in ultraviolet light, revealing thin layers of hydrogen and helium stripped away ...

New evidence suggests that a dwarf galaxy orbiting the Milky Way called Ursa Major III is actually a star cluster.

Two colliding galaxies have been found to be reorganizing their dwarf satellites, potentially solving a major conundrum ...

Ursa Major III, the faintest object in our galaxy, orbits the Milky Way at a distance of more than 30,000 light years. Until ...