Cos-B
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Image:COS-B.gif
COS-B
Cos-B was the first European Space Agency mission to study gamma-ray sources. The mission consisted of a satellite containing X-ray and gamma-ray detectors, which was launched by NASA on behalf of the ESA on August 9, 1975. The mission was completed on April 25, 1982, after the satellite had been operational for more than 6.5 years, four years longer than planned. Scientific results included the 2CG Catalogue listing around 25 gamma ray sources and a map of the Milky Way. The satellite also observed the Cygnus X-3 pulsar.
