Michael E. Brown

Michael E. Brown (born 5 June 1965) has been a professor of planetary astronomy at the California Institute of Technology (Caltech) since 2003. His study of the minor planet 2003 UB313 led to new discussion about the classification of the planets, as this new object was both further away and larger than Pluto.

Sourced

 * I may go down in history as the guy who killed Pluto.