Schmitt, an experienced geologist, is the only scientist to have walked on the Moon. He and Eugene Cernan explored the surface with a lunar rover, collecting rock samples, taking photographs and setting up science experiments.
Schmitt was also involved in the scientific aspects of the other Apollo landings and instructed crew members in lunar geology and feature recognition.
Photo: Harrison Schmitt takes lunar samples (NASA/Eugene Cernan)
The only scientist to walk on the Moon flew on Apollo 17.
The only scientist to walk on the Moon finds orange volcanic soil.
In 1972, Apollo 17's Harrison Schmitt, the only scientist to walk on the Moon, and his fellow astronaut Eugene Cernan discovered orange volcanic soil. At first, it was thought that this was evidence of recent lunar volcanism.
Apollo 13's Jim Lovell and his fellow astronauts tell James Burke how it was done.
Jim Lovell and his fellow astronauts tell the BBC's James Burke what happened when nature called during the Apollo and Gemini missions.
Apollo astronaut Harrison Schmitt shows James May around the Saturn V.
Apollo 17 astronaut Harrison Schmitt shows James May around the Saturn V rocket and describes what it felt like to be sitting on top of a bomb.
Astronauts remember what it was like to walk on the Moon.
Apollo astronauts Harrison Schmitt and Edgar Mitchell describe what it was like to walk on the Moon and their disappointment when the lunar programme was cancelled.
Harrison Hagan "Jack" Schmitt (born July 3, 1935) is an American geologist, a retired NASA astronaut, university professor, and a former U.S. senator from New Mexico.
He was the twelfth and last man to walk on the Moon, as Apollo 17 crewmate Eugene Cernan exited the Apollo Lunar Module first. However, as Schmitt re-entered the module first, Cernan became the last astronaut to walk on and depart the moon. Schmitt is also the only geologist as well as the only person to have walked on the Moon who was never a member of the United States Armed Forces, although he is not the first civilian, since Neil Armstrong left military service prior to his landing in 1969.
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