The long, puzzling dwarf planet Ceres, in reality the first named asteroid, has surface features that are much more complex ...

Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for being a planet, putting Pluto into the new category of dwarf planet ...

For the longest time, the Solar System was known to have nine planets. Eventually, Pluto got downgraded to a dwarf planet due to the discovery of various other celestial bodies found in the Solar ...

A young red dwarf can look calm from a distance. But buried in its light may be the chemical remains of a wrecked world.

Current NASA head Jared Isaacman, himself something of a controversial choice, is determined to get Pluto reclassified as a ...

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Astronomers have found some of the strongest evidence yet that stars can swallow their own planets. A new study, published in ...