What color is Eris?
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.