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Eris is green which is unlike any other planet an very unusual. Eris is also the largest known dwarf planet in the Solar System. It is approximately 2 500 kilometers in diameter and 27% more massive than Pluto. Since it is so far away it take Eris about 558 years to orbit around to Sun. Eris was first spotted in 2003 by a Palomar Observatory-based team led by Mike Brown.
