He was a member of the Apollo 17 mission in 1972 and thereby the first and only geologist to land on the moon. Schmitt served for six years as a United States Senator as a Republican, representing New Mexico, defeating incumbent Joseph Montoya in 1976. However, mainly due to his staunch support of the economic policies of his fellow Republican, President Ronald Reagan, Schmitt himself was defeated by Democrat Jeff Bingaman in 1982.
Harrison Hagan "Jack"Schmitt (born July 3, 1935) is a geologist, astronaut and former U.S. senator.
Because Schmitt was the only geologist in the astronaut corps and, as well, had spent considerable time becoming proficient in the CSM and LM systems, it came as no surprise when, in March 1970, he became the first of the scientist-astronauts to receive a crew assignment.
Schmitt was portrayed by Tom Amandes in the 1998 miniseries From the Earth to the Moon.