Eris is the solar system's second largest dwarf planet. It is also the largest dwarf planet and the ninth-largest planetary body orbiting the sun. Mike Brown and his team at Palomar Observatory discovered Eris in 2005. Dysnomia is the name of Eris's moon. Originally, Eris was thought to be large enough to be classified as a planet, but the International Astronomical Union (IAU) redefined the term "planet" and classified it as a "dwarf planet." Eris is named after the Greek goddess Eris, though Mike Brown had intended to name it Lilah.
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