Michael Brown, professor of planetary astronomy at Caltech, is most famous for demoting Pluto from planet to planetoid—a sad but necessary consequence of his discovery that there are numerous planetoids of similar size orbiting far from the sun. His memoir, How I Killed Pluto and Why It Had It Coming, covers the rancor that led to the 2006 International Astronomical Union's vote in its disfavor. — Read the rest
