It was Brown's discovery of Eris, the Kuiper Belt Object slightly larger than Pluto, that finally forced the International Astronomical Union to define just what is and isn't a planet back in August. Under one IAU proposal, the number of planets in the solar system would have ballooned to 53, including Brown's find, Eris. However, that idea was deemed ridiculous by world class astronomers and kindergarten teachers alike, and a few days later the current eight planet ruling came down and kicked Pluto to the curb. Even though the ruling meant that Brown's find wasn't, in fact, a planet, he's a fan of the eight planet system. "Who says that 53 is too many? I do," Brown said. "I want my planets to mean something." Plus, he really seems to hate Pluto and surely took some twisted pleasure in knocking it down a notch.