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

Rocky planets orbiting in an M-dwarf’s habitable zone are called M-Earths. M-Earths differ from our Earth in fundamental ways.

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...

Expected Brown Dwarf Star DiscoveriesB While LSST is projected to discover thousands of brown dwarfs stars. Objects that are 13-80 times the mass of Jupiter and are often free-floating or orbiting ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between five and 18, plus hundreds of potentially undiscovered ones, depending on ...

Dwarf Planets NASA's New Horizons spacecraft flew past Pluto in the July 2015, snapping several photos of the dwarf planet and its giant, heart-shaped geographical feature.