John Leonard Swigert Jr. was an American NASA astronaut, test pilot, mechanical engineer, aerospace engineer, United States Air Force pilot, and politician. In April 1970, as command module pilot of Apollo 13, he became one of 24 astronauts who flew to the Moon. Ironically, due to the "slingshot" route around the Moon they chose to safely return to Earth, the Apollo 13 astronauts flew farther away from Earth than any other astronauts before or since, though they had to abort the Moon landing.
Swigert in 1971
Swigert (right) with the "mailbox" rig improvised to adapt the Apollo 13 command module Odyssey's square carbon dioxide scrubber cartridges to fit the lunar module Aquarius, which took a round cartridge
Swigert during suit-up before the launch of Apollo 13, April 11, 1970
An astronaut is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists.
NASA astronaut Bruce McCandless II using a Manned Maneuvering Unit outside Space Shuttle Challenger on shuttle mission STS-41-B in 1984
Alan Shepard aboard Freedom 7 (1961)
The first sixteen NASA astronauts to be selected, February 1963. Back row: White, McDivitt, Young, See, Conrad, Borman, Armstrong, Stafford, Lovell. Front row: Cooper, Grissom, Carpenter, Schirra, Glenn, Shepard, Slayton.
The first eleven Soviet cosmonauts to fly, July 1965. Back row, left to right: Leonov, Titov, Bykovsky, Yegorov, Popovich; front row: Komarov, Gagarin, Tereshkova, Nikolayev, Feoktistov, Belyayev.