Cos-B
Spacecraft
COS-B was the first European Space Research Organisation mission to study cosmic gamma ray sources. COS-B was first put forward by the European scientific community in the mid-1960s and approved by the ESRO council in 1969. Wikipedia
Launch date: August 9, 1975
Manufacturer: European Space Agency
Mission duration: 2.5 years (planned); 10 years, 5 months and 8 days (achieved)
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