Harrison Schmitt credits the image to the entire Apollo 17 crew. 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. As he returned to the Lunar Module before Cernan, Schmitt is the next-to-last person to have walked on the Moon's surface. After the completion of Apollo 17, Schmitt played an active role in documenting the
Ronald Evans (astronaut) 1973, and was named Kansan of the Year in 1972. He was inducted into the International Space Hall of Fame in 1983, and the U.S. Astronaut Hall of Fame on October 4, 1997. Ronald Evans (astronaut) Ronald Ellwin Evans Jr. (November 10, 1933 – April 7, 1990), (Capt, USN), was an American naval officer and aviator, electrical engineer, aeronautical engineer, and NASA astronaut, also one of only 24 people to have flown to the Moon. Evans was selected as an astronaut by NASA as part of Astronaut Group 5 in 1966 and made his first and only flight into space