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Soyuz 31, cosmonauts valery bykovsky and sigmund jahn (gdr) at baikonur, 1978.
German cosmonaut Sigmund Jähn
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1978 Sigmund Jähn - First German in Space
26th August 2023 - 45th Anniversary.

Sigmund Werner Paul Jähn, born 13 February 1937,
German cosmonaut and pilot, who in 1978 became the first German (GDR) to fly in space as part of the Soviet Union's Interkosmos programme.