Ronald Evans (astronaut) 19 astronauts selected by NASA in April 1966. He served as a member of the astronaut support crews for the Apollo 7 and Apollo 11 flights, and as backup Command Module Pilot for Apollo 14. Evans' only space flight was as Command Module Pilot of Apollo 17, the last scheduled U.S. manned mission to the Moon. He was accompanied by Eugene Cernan and Harrison Schmitt. While Cernan and Schmitt landed and worked on the Moon in the Taurus–Littrow valley, Evans remained in lunar orbit on board the Command Module "America", completing assigned work tasks which required visual geological observations, hand-held
NASA Astronaut Group 4 natural sciences or engineering was a prerequisite for selection), with NASA providing pilot training as necessary. Initial screening of applicants was conducted by the National Academy of Sciences, which characterized the pool as "disappointing." Of the six ultimately chosen, four had military experience, with Garriott having previously completed the USAF Pilot Training Program. Schmitt, a geologist, walked on the Moon, while Garriott, Gibson and Kerwin all flew to Skylab. Garriott also flew on the Space Shuttle. Graveline and Michel left NASA without flying in space. NASA Astronaut Group 4 Astronaut Group 4 (The Scientists) was a group of six astronauts