Eris, The Dwarf Planet

Eris was first spotted in 2003 during a Palomar Observatory survey of the outer solar system by Mike Brown, a professor of planetary astronomy at the California Institute of Technology; Chad Trujillo of the Gemini Observatory; and David Rabinowitz of Yale University. The discovery was confirmed in January 2005, and was submitted as a possible 10th planet of our solar system since it was the first object in the Kuiper Belt found to be bigger than Pluto.