Eris: The Dwarf Planet That is Pluto's Twin
Tuesday, January 27, 2015 - 02:30
in Astronomy & Space
Eris, a distant world whose discovery led to Pluto's demotion to dwarf planet, was once proposed as the solar system's 10th planet.
Updated by artificial intelligence Tue, 13 Jun 2023, 2:53:47 UTC Learn more
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