A large icy object that helped spark the debate over Pluto’s status has officially been named Eris, after the Greek goddess of discord. The object had been known as 2003 UB313 since its discovery was ...
In the outer Solar System, the dwarf planet Eris is locked in a mutual dance with its moon Dysnomia 1. Eris, the most massive object known in the Solar System beyond Neptune, is so distant that it ...
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