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Skylab's impending demise in 1979 was an international media event, [150] with T-shirts and hats with bullseyes [9] and "Skylab Repellent" with a money-back guarantee, [151] wagering on the time and place of re-entry, and nightly news reports.
On August 15, 1978, Smith accepted a one-year assignment as deputy associate administrator for Space Transportation Systems at NASA Headquarters, Washington, D.C. He served as director of the Skylab Task Force appointed by the NASA administrator to represent NASA preceding and following the reentry of Skylab.
Each thruster was intended to produce a thrust of 2.25 to 4.5-kilograms (5 to 10-pounds) [2] These thrusters would be used for leaving the Shuttle's payload bay and for rendezvous and docking with Skylab. [2] For the Skylab boost or de-orbit, the TRS would have four strap-on boosters each with 680 kg (1,500 Ib.) of hydrazine rocket fuel. [2]
On July 11, 1979, the US Skylab space station (77,100 kilograms [170,000 lb]) reentered and spread debris across the Australian Outback. [76] The reentry was a major media event largely due to the Cosmos 954 incident, but not viewed as much as a potential disaster since it did not carry toxic nuclear or hydrazine fuel.
Skylab [3] USA: 69,000 kg (152,000 lb) 11 July 1979: 6 years: Partially Controlled: 14 May 1973 Salyut 7/Cosmos 1686: USSR: 40,000 kg (88,000 lb) 7 February 1991: 8 years: Uncontrolled: 13 May 1982 S-II Stage / Skylab: USA 36,200 kg (79,700 lb) 11 January 1975 18 Months Uncontrolled 14 May 1973 STS external tank (Standard Tank) USA
Heavy solar activity was a factor in causing the earlier-than-expected atmospheric reentry of Skylab in 1979. [9] Data from solar cycle 20 was used to build the K-1974 solar proton fluence model, used for planning space missions during solar cycle 21. [10]
In the early planning stages of the Space Shuttle program, STS-2 was intended to be a reboost mission for the aging Skylab space station. [note 2] However, such a mission was impeded by delays with the Shuttle's development and the deteriorating orbit of Skylab. Skylab ultimately de-orbited on July 11, 1979, two years before the launch of STS-2 ...
Efforts by non-NASA professionals led to clear results. First, if Skylab had come down on or near a major city, the two-hour warning would have risked an urban panic. That panic would have been more dangerous than the satellite reentry. Second, Skylab was projected to break up to some 5,000 lethal pieces. A danger to man, animal, and airplane.
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