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May 14 marks the 40th anniversary of the launch of America's first space station. Skylab launched into low-Earth orbit on May 14, 1973. It was the nation's first foray into significant scientific research in microgravity. The three Skylab crews proved humans could live and work effectively for long durations in space. The knowledge gathered during Skylab helped inform development and construction of the International Space Station (ISS), just as the research and technology demonstrations being conducted aboard the ISS will help shape a new set of missions that will take Americans farther into the solar system.