description Apollo-Soyuz Test Project Overview
The Apollo-Soyuz Test Project was a joint space mission conducted in July 1975 by the United States and the Soviet Union. It marked the first time spacecraft from two different nations docked in orbit, serving as a symbol of diplomatic détente during the Cold War. An American Apollo module successfully docked with a Soviet Soyuz capsule, allowing the crews to conduct scientific experiments and shake hands in space. The mission involved three astronauts and two cosmonauts.
help Apollo-Soyuz Test Project FAQ
What happened during the Apollo-Soyuz docking?
An American Apollo spacecraft and the Soviet Soyuz 19 docked in orbit in July 1975. Their crews opened the connecting hatches, exchanged greetings and conducted joint experiments before separating.
Who flew on the Apollo-Soyuz Test Project?
The American crew was Thomas Stafford, Vance Brand and Deke Slayton. The Soviet crew consisted of Alexei Leonov, the first person to conduct a spacewalk, and Valeri Kubasov.
Why did Apollo-Soyuz need a special docking module?
Apollo and Soyuz used incompatible docking systems and different cabin atmospheres. A purpose-built docking module acted as both an adapter and an airlock between the two spacecraft.
Was Apollo-Soyuz the final Apollo mission?
Yes, it was the last flight of an Apollo spacecraft and the final crewed American space mission until the first Space Shuttle flight in 1981. It also became a prominent symbol of U.S.-Soviet cooperation during détente.
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