Spacecraft which reentered in 1975

Apollo–Soyuz was the first crewed international space mission, conducted jointly by the United States and the Soviet Union in July 1975. Millions watched on television as an American Apollo spacecraft docked with a Soviet Soyuz capsule. The mission and its symbolic "handshake in space" became an emblem of détente during the Cold War.

crewed flight of the Soyuz programme

Soviet space station launched on 25 June 1974

AEROS satellites were to study the aeronomy i. e. the science of the upper atmosphere and ionosphere, in particular the F region under the strong influence of solar extreme ultraviolet radiation. To this end the spectrum of this radiation was recorded aboard by one instrument (of type Hinteregger) on the one hand and a set of 4 other instruments measuring the most important neutral uand iononized parameters at the satellite's position on the other.