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This is the Skylab 4 Command Module, which served as the crew cabin for going to and from Skylab, the first U.S. space station. Skylab 4, the third and last of the Skylab missions, was launched on November 16, 1973 with Command and Service Modules CSM-118. The three-person crew, Gerald P. Carr, William R. Pogue, and Edward G. Gibson, spent 84 days on orbit, landing on February 8, 1974. The mission included the observation of the comet Kohoutek, among numerous experiments. The crew completed 1,214 Earth orbits and four extra-vehicular activities totaling 22 hours, 13 minutes. CSM-118 was transferred from NASA to the Smithsonian in 1975. Artist North American Rockwell. (Photo by Heritage Art/Heritage Images via Getty Images)