Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

In December 2003, the Hubble Telescope spotted something peculiar on the surface of Ceres, a dwarf planet in the asteroid belt between Mars and Jupiter. Hazy images revealed something bright and ...

Out on the edge of the solar system beyond Pluto, an oblong dwarf planet poses a puzzle for astronomers. Makemake (Mah-kay-Mah-kay), a world some 890 miles across, orbits about 4.85 billion miles ...

A dwarf planet called Ceres could offer some amazing insights into our quest to discover alien life within our solar system. The small planet is located near Mars, and a new study showcases that ...

But Pluto turned out to be too tiny — it is smaller than the moon — and was demoted to dwarf planet status in 2006. There are now four other officially recognized dwarf planets, and Cheng ...