James Lovell navigated to the Moon and back twice.
He served as command module pilot on Apollo 8, the first mission to the Moon, and as spacecraft commander on Apollo 13, the aborted lunar landing mission.
All three astronauts helped navigate the Apollo 8 spacecraft, but Lovell was responsible for getting it to the Moon and back. Among the tools Lovell used was a sextant, much like those once used by mariners at sea.
With the ill-fated Apollo 13 mission, Lovell became the only astronaut to orbit the Moon twice without landing. (John Young and Gene Cernan went twice, but both walked on the Moon).
