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User:Konstanty/Eris (dwarf planet)
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Eris (originally Xena) is a dwarf planet located in the Kuiper belt. Discovered in 2005 by Mike Brown, it was one of the causes of Pluto getting "demoted" to dwarf planet status by the IAU in 2005. Compared to the other known bodies orbiting the Sun, Eris is the ninth largest, being almost a third larger than Pluto.