Skylab 4 Pilot's Flight Data File (William R. Pogue Collection)

Skylab 4, the third manned Skylab mission (Skylab 1 was the launch of the unmanned vehicle itself), was launched by NASA on 16 November 1973. During their record-setting 84 days in space, the three-man crew, consisting of astronauts Gerald Carr, Edward Gibson, and William Pogue, conducted a variety of experiments and observations, including material handling, medical, and student-designed experiments. Upon their return to earth on 8 February 1974, Skylab 4 became, and still remains, the longest duration US manned space flight.