On Dec. 10, 1977, the Soviet Union launched the first crew to complete a long-duration mission to the Salyut 6 space station. See how it happened in our "On This Day In Space" series!
On Dec. 10, 1977, the Soviet Union launched the first crew to complete a long-duration mission to the Salyut 6 space station. See how it happened in our "On This Day In Space" series!
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