Jack Schmidt

As he returned to the Lunar Module before Cernan, Schmitt is the next-to-last person to have walked on the Moon's surface. Since the death of Cernan in 2017, Schmitt is the most recent person to have walked on the Moon who is still alive.

While on the Moon's surface, Schmitt — the only geologist in the astronaut corps — collected the rock sample designated Troctolite 76535, which has been called "without doubt the most interesting sample returned from the Moon". Among other distinctions, it is the central piece of evidence suggesting that the Moon once possessed an active magnetic field.

Schmitt is an adjunct professor of engineering physics at the University of Wisconsin–Madison, and has long been a proponent of lunar resource utilization. In 1997 he proposed the Interlune InterMars Initiative, listing among its goals the advancement of private-sector acquisition and use of lunar resources, particularly lunar helium-3 as a fuel for notional nuclear fusion reactors.

In January 2011, he was appointed as secretary of the New Mexico Energy, Minerals and Natural Resources Department in the cabinet of Governor Susana Martinez, but was forced to give up the appointment the following month after refusing to submit to a required background investigation. El Paso Times called him the "most celebrated" candidate for New Mexico energy secretary.

Schmitt's view on climate change emphasizes natural over human factors as driving climate. Schmitt has expressed the view that the risks posed by climate change are overrated and suggests instead that climate change is a tool for people who are trying to increase the size of government. He resigned his membership in the Planetary Society primarily because of its Mars-first policy, but also because of its stance on global warming, writing in his resignation letter that the "'global warming scare' is being used as a political tool to increase government control over American lives, incomes and decision making. It has no place in the Society's activities. [sic]" Schmitt spoke at the March 2009 International Conference on Climate Change sponsored by the Heartland Institute. He appeared in December that year on the Fox Business Network, saying "[t]he CO2 scare is a red herring".

Schmitt was chair of the NASA Advisory Council, whose mandate is to provide technical advice to the NASA Administrator, from November 2005 until his abrupt resignation on October 16, 2008. In November 2008, he quit the Planetary Society over policy advocacy differences, citing the organization's statements on "focusing on Mars as the driving goal of human spaceflight" (Schmitt said that going back to the Moon would speed progress toward a manned Mars mission), on "accelerating research into global climate change through more comprehensive Earth observations" (Schmitt voiced objections to the notion of a present "scientific consensus" on climate change as any policy guide), and on international cooperation (which he felt would retard rather than accelerate progress), among other points of divergence.

Schmitt is one of the astronauts featured in the 2007 documentary In the Shadow of the Moon. He also contributed to the 2006 book NASA's Scientist-Astronauts by David Shayler and Colin Burgess.

Schmitt wrote a book entitled Return to the Moon: Exploration, Enterprise, and Energy in the Human Settlement of Space in 2006.

He sought a second term in 1982, facing state Attorney General Jeff Bingaman. Bingaman attacked Schmitt for not paying enough attention to local matters; his campaign slogan asked, "What on Earth has he done for you lately?" This, combined with the deep recession, proved too much for Schmitt to overcome; he was defeated, 54% to 46%.

Schmitt was one of five inductees into the International Space Hall of Fame in 1977. He was one of 24 Apollo astronauts who were inducted into the U.S. Astronaut Hall of Fame in 1997.

In the Republican primary, held on June 1, 1976, Schmitt defeated Eugene Peirce. In the election, Schmitt opposed two-term Democratic incumbent Joseph Montoya. He defeated Montoya 57% to 42%.

Schmitt resigned from NASA in August 1975 to run for election to the United States Senate as a member from New Mexico. As the Republican candidate in the 1976 election, he defeated Democratic incumbent Joseph Montoya. In the 1982 election, Schmitt was defeated by Democrat Jeff Bingaman.

In December 1972, as one of the crew on board Apollo 17, Schmitt became the first member of NASA's first scientist-astronaut group to fly in space. As Apollo 17 was the last of the Apollo missions, he also became the twelfth and second-youngest person to set foot on the Moon and the second-to-last person to step off of the Moon (he boarded the Lunar Module shortly before commander Eugene Cernan). Schmitt also remains the only professional scientist to have flown beyond low Earth orbit and to have visited the Moon. He was influential within the community of geologists supporting the Apollo program and, before starting his own preparations for an Apollo mission, had been one of the scientists training those Apollo astronauts chosen to visit the lunar surface.

Schmitt spent considerable time becoming proficient in the CSM and LM systems. In March 1970 he became the first of the scientist-astronauts to be assigned to space flight, joining Richard F. Gordon Jr. (Commander) and Vance Brand (Command Module Pilot) on the Apollo 15 backup crew. The flight rotation put these three in line to fly as prime crew on the third following mission, Apollo 18. When Apollo 18 and Apollo 19 were cancelled in September 1970, the community of lunar geologists supporting Apollo felt so strongly about the need to land a professional geologist on the Moon, that they pressured NASA to reassign Schmitt to a remaining flight. As a result, Schmitt was assigned in August 1971 to fly on the last mission, Apollo 17, replacing Joe Engle as Lunar Module Pilot. Schmitt landed on the Moon with commander Gene Cernan in December 1972.

Before joining NASA as a member of the first group of scientist-astronauts in June 1965, he worked at the U.S. Geological Survey's Astrogeology Center at Flagstaff, Arizona, developing geological field techniques that would be used by the Apollo Crews. Following his selection, Schmitt spent his first year at Air Force UPT learning to become a jet pilot. Upon his return to the astronaut corps in Houston, he played a key role in training Apollo Crews to be geologic observers when they were in lunar orbit and competent geologic field workers when they were on the lunar surface. After each of the landing missions, he participated in the examination and evaluation of the returned lunar samples and helped the crews with the scientific aspects of their mission reports.

Harrison Hagan "Jack" Schmitt (born July 3, 1935) is an American geologist, retired NASA astronaut, university professor, former U.S. senator from New Mexico, and the most recent person still living to have walked on the Moon.

Jack Schmidt was born on September 19, 1927 in San Francisco, California, USA.