U.S. space exploration history on U.S. stamps also the only space station NASA launched alone. The 100-ton space station was in Earth's orbit from 1973 to 1979 and it was visited by crews three times in 1973 and 1974. Circling 50 degrees north and south of the equator at an altitude of , Skylab had an orbital period of 93 minutes. There were a plethora of UV astronomy experiments done during the Skylab lifetime, as well as detailed X-ray studies of the Sun. The station was active until July 11, 1979, when it fell out of orbit. The 10-cent Skylab commemorative stamp first day of release took
Conquest of Space the film at 60% ("Fresh"). Conquest of Space Conquest of Space is a 1955 American Technicolor science fiction film from Paramount Pictures, produced by George Pal, directed by Byron Haskin, that stars Walter Brooke, Eric Fleming, and Mickey Shaughnessy. The storyline concerns the first interplanetary flight to the planet Mars, manned by a crew of five, and launched from Earth orbit near "The Wheel", mankind's first space station. On their long journey to the Red Planet, they encounter various dangers, both from within and without, that nearly destroy the mission. Mankind has achieved space flight capability and built "The Wheel"