This second generation of the Soyuz spacecraft, the Soyuz 7k-T was flown on Soyuz 12 through Soyuz 40 missions from 1973–1981. The new 7K-T spacecraft...
At this point in 1973, the Soviets were attempting to fly 2 types of space station, the long duration orbital station scientific version called DOS....
Despite predictions, events seldom occur precisely as expected. The calculated breakup altitude of Skylab was based on its intended structural strength...
The official decision to proceed with the Skylab reboost mission was made on September 1st 1977, initiating a two-year preparation period for the development...
Early in the planning stages of the Skylab flight, there was a desire to keep it in orbit long enough to use it as the core of a larger station.
The...