Mike Brown is an American astronomer who is credited with discovering the dwarf planet Eris. Eris is larger than Pluto, and Brown is thus known as the man who “killed Pluto” because he furthered Pluto being downgraded to a dwarf planet.
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Eris (minor-planet designation 136199 Eris) is the most massive dwarf planet known in the Solar System, and the ninth most massive body known to directly orbit the Sun.
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