Caption: Mike Brown (1965--) of Caltech.

Mike Brown was the team leader of the team that discovered dwarf planet Eris. Said discovery seems to have been immediate cause of downgrading Pluto from planet to dwarf planet. But Pluto retains a faded glory---and it's the only ex-planet.

Credit/Permission: NASA before or circa 2005 (uploaded to Wikimedia Commons by User:GDK, 2007) / Public domain.
Image link: Wikimedia Commons: File:Michael E Brown 1.jpg.
Local file: local link: mike_brown.html.
File: Astonomer file: mike_brown.html.