Apollo program a total of over 20 hours EVA. Apollo 17 was the last of the Apollo program, landing in the Taurus–Littrow region in December 1972. Eugene Cernan commanded Ronald E. Evans and NASA's first scientist-astronaut, geologist Dr. Harrison H. Schmitt. Schmitt was originally scheduled for Apollo 18, but the lunar geological community lobbied for his inclusion on the final lunar landing. Cernan and Schmitt stayed on the surface for just over three days and spent just over 23 hours of total EVA. Source: "Apollo by the Numbers: A Statistical Reference" (Orloff 2004) The Apollo program returned over of lunar rocks and
Curt Michel NASA scientist-astronaut in June 1965. He resigned from NASA in September 1969 without having being assigned to any spaceflight missions. Michel believed that it was his decision to resign, after it became clear that he would not be given a flight assignment, that motivated the scientific community to demand that his fellow scientist-astronaut Harrison Schmitt be reassigned to Apollo 17 after Schmitt's planned mission on Apollo 18 was cancelled. After his resignation from NASA, Michel returned to teaching and research at Rice, where he also served as chair of the space physics and astronomy department from 1974 to 1979. He