there was exactly 4
Skylab was a space station launched and operated by NASA (the space agency of the United States) and was the U.S.'s first space station. Skylab orbited the Earth from 1973 to 1979, and included a workshop, a solar observatory, and other systems. It was inhabited by 3 different crews. The Skylab 1 crew (Pete Conrad, Paul Weitz, Joe Kerwin) was launched on May 23, 1973. They were charged with repairing the solar array panel that was damaged during launch. They also installed an umbrella on the outside of Skylab to keep the vehicle from overheating. Within days they were working on their experiments. Skylab 1 spent a total of 28 days in space. Each of the 3 Skylab crews set records for duration in space. The Skylab 2 crew (Alan Bean, Jack Lousma, Owen Garriott) launched July 28, 1973. They spent 59 1/2 days performing solar and earth studies from space. The Skylab 3 crew (Gerald Carr, Bill Pogue, Ed Gibson) launched on November 16, 1973 and spent 84 days working in Skylab. The last cew left Skylab on February 8, 1974. Skylab was destroyed when it reentered earth's atmosphere on July 11, 1979.
cheese
There were three astronauts on each Skylab mission, making a total of nine astronauts who visited Skylab from 1973 to 1974.
skylab was built in may,1973
3-3, 3-3, 4-1
skylab
Skylab I was launched on 14 May 1973.
2-4, 2-4, 3-3, 3-3
4-4 4-4 3-3 3-3 4-2 2-5
2/2 + 3/4 = 4/4 + 3/4= 7/4= 1 3/4 or 2/2= 1 +3/4= 1 3/4
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