... Skylab was the first and so far last all-American space station to orbit the Earth. ... Skylab was the first NASA project designed to explore how space flight could expand and enhance human well-being on Earth (said NASA).€а The astronauts who worked on Skylab performed experiments and observations across many fields, including Earth observation, solar astronomy, stellar astronomy, space physics, geophysics, micro-gravity biomedical and biological studies and micro-gravity technology research. ...