James W. Christy

James W. Christy
James Christy (left) and Robert Harrington in 1978.
Born	(1938-09-15) September 15, 1938 (age 85) Milwaukee, Wisconsin, U.S.
Alma mater	University of Arizona
Scientific career
Fields	Astronomy, astrometry
Institutions	United States Naval Observatory Hughes Missile Systems

James Walter "Jim" Christy (born September 15, 1938) is an American astronomer known for discovering Charon, the largest moon of the dwarf planet Pluto.