In Pictures: Skylab, NASA's first space station ma...
This sketch of Skylab was drawn by George Mueller, NASA associate administrator for manned space flight. This concept drawing was created at a meeting at the Marshall Space Flight Center on Aug. 19, 1966. In 1970, the station became known as Skylab. Three crewed Skylab missions (Skylab 2 in May 1973, Skylab 3 in July 1973 and Skylab 4 in November 1973) were flown, NASA said.
In Pictures: Skylab, NASA's first space station marks 40 years