Pluto is the most famous dwarf planet, due in part to its very public demotion from ninth planet of the solar system two decades ago. But a relatively obscure dwarf planet in the main asteroid ...

Astronomers think that a dwarf planet hiding in the middle of our solar system could be a source of frozen water. The dwarf ...

Your browser does not support the video element. For the first time, NASA scientists have found direct evidence of a mysterious form of icy volcanism on a former ...

This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...

Scientists using a telescope in Hawaii have discovered a never-before-seen dwarf planet lurking within the ring of icy bodies beyond the orbit of Neptune. The small new world -- temporarily named ...

Astronomers may have solved a enigma involving a mysterious X-ray signal from a dying star that's been puzzling scientists since 1980. New data from NASA's Chandra X-ray Observatory telescope and ...