Stuart Allen Roosa (1933-1994) was an American aeronautical engineer, smokejumper, United States Air Force pilot, test pilot, and NASA astronaut, who was the Command Module Pilot for the Apollo 14 mission. The mission lasted from January 31 to February 9, 1971, and was the third mission to land astronauts (Alan Shepard and Edgar Mitchell) on the Moon. While Shepard and Mitchell spent two days on the lunar surface, Roosa conducted experiments from orbit in the Command Module Kitty Hawk. He was one of 24 men to travel to the Moon, which he orbited 34 times.
Roosa was one of 19 people selected as part of the astronaut class of 1966. He was the Capsule communicator (CAPCOM) at the Launch Complex 34 blockhouse during the Apollo 1 fire on January 27, 1967. In 1969, he served as a member of the astronaut support crew for the Apollo 9 mission.
On Apollo 14 he spent 33 hours in solo orbit around the Moon, conducting an extensive series of experiments. On the Apollo 14 mission Roosa carried seeds from loblolly pine, sycamore, sweet gum, redwood, and Douglas fir trees as part of a joint U.S. Forest Service/NASA project. The seeds were germinated on his return and planted throughout the United States, becoming known as the "Moon Trees".
Following Apollo 14, Roosa served as backup Command Module Pilot for Apollo 16 and Apollo 17, and based on crew rotations, would probably have commanded one of the last Apollo missions had they not been cancelled. He was assigned to the Space Shuttle program until his retirement as a colonel from the Air Force in 1976.
Roosa logged 5,500 hours of flying time; 5,000 hours in jet aircraft. He also logged 217 hours in space.