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Where did you go to university? http://mijnnn.icu jb nn After Apollo, NASA used the leftover hardware for several different stopgap missions. One of the most ambitious was Skylab, which was a space station made out of a Saturn V S-IVB upper stage. More surplus Apollo spacecraft were used to crew and service Skylab. The station was manned from 1973 to 1974 and de-orbited in 1979.