Portal:Spaceflight/Selected article/Week 29 2008

Skylab was the first space station the United States launched into orbit, and the second space station ever visited by a human crew. 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. It included a laboratory for studying the effects of microgravity and the Apollo Telescope Mount solar observatory.

Skylab was launched 14 May 1973 by a Saturn INT-21 rocket (a two-stage version of the Saturn V) into a 435 kilometres (270 mi) orbit. Severe damage was sustained during launch, including the loss of the station's micrometeoroid shield/sun shade and one of its main solar panels. Debris from the lost micrometeoroid shield further complicated matters by pinning the remaining solar panel to the side of the station, preventing its deployment and thus leaving the station with a huge power deficit. The station underwent extensive repair during a spacewalk by the first crew, which launched on 25 May 1973 atop a Saturn IB. Two additional missions followed, Skylab 3 on 28 July 1973 and Skylab 4 on 16 November 1973. The last Skylab crew returned to Earth on 8 February 1974.

Increased solar activity, heating the outer layers of the Earth's atmosphere and thereby increasing drag on Skylab, led to an early reentry at approximately 16:37 UTC 11 July 1979 over the Indian Ocean and Western Australia. Debris was found between Esperance and Rawlinna, 31–34°S, 122–126°E. The Shire of Esperance fined the United States $400 for littering. (more...)