Astronomy Today

Gamma-Ray Space Telescopes

What was the COS-B satellite?

COS-B was an X-ray and gamma-ray telescope that was operated by the European Space Agency from August 9, 1975, to April 25, 1982. Important scientific results achieved by COS-B included the first gamma-ray map of the Milky Way galaxy, observations of the Cygnus X-3 pulsar, and a catalog of twenty-five powerful gamma-ray sources.

A Cherenkov gamma-ray telescope detects radiation that is the result of electrically charged particles passing through a medium at a speed faster than light normally passes through that particular medium.


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