On July 11, 1979, Skylab, the first manned US space laboratory, returned to Earth after six years in space.
Werner von Braun was one of the early advocates for an American space station as early as the 1950s. He imagined a massive circular station that rotated to create artificial gravity and was manned by 80 people to forecast weather, study the solar system, and launch expeditions to the Moon and Mars. While many these goals could be carried out without the use a space station, many saw merit in a smaller space station for scientific study.