Apollo-Soyuz Test Project

Author(s): DaveBowman2001 linuxman

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The Apollo-Soyuz Test Project (ASTP) is the first crewed international space mission in history, carried out jointly by the United States and the Soviet Union in July 1975. It symbolized the end of the Space Race that started with the launch of Sputnik 1 in 1957 and reached its peak during Apollo 11 in 1969. ASTP marked the last flight of the Apollo Program, with the US portion sometimes being referred to (unofficially) as Apollo 18. The mission's legacy on peaceful cooperation in space is still felt today aboard the International Space Station since 1998


  • - Requires the Project Apollo addon installed in order to see the full ASTP mission in action. Without it, by default only the Soyuz missions are visible on this addon
  • - Also includes the three precursor test flights and one post-ASTP mission of the Soyuz 7K-TM spacecraft (see Table below)

Apollo-Soyuz, also known as Soyuz-Apollo in the USSR, docked together on July 1975

Apollo 18

Soyuz 19

The two crews of Apollo-Soyuz: (Top) Tom Stafford and Alexei Leonov, (Below) Deke Slayton, Vance Brand and Valery Kubasov

Apollo-Soyuz Test Project
Mission Start End
Soyuz 19 1975-Jul-151975-Jul-21
Apollo 181975-Jul-24
Timeline of ASTP, the first international crewed spaceflight in history

Soyuz 7K-TM
Mission Start End
Cosmos 638 1974-Apr-31974-Apr-13
Cosmos 672 1974-Aug-121974-Aug-18
Soyuz 16 1974-Dec-21974-Dec-8
Crewed test flight/dress rehearsal before ASTP
Soyuz 19 1975-Jul-151975-Jul-21
The Soviet part of the ASTP mission
Soyuz 22 1976-Sept-151976-Sept-23
Final non-space station crewed mission of the Soyuz spacecraft
Timeline of Soyuz 7K-TM missions, 1974-1976

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