| 单词 | cos-b |
| 释义 | COS-BCOS-B(koz-bee ) A satellite of the European Space Agency that was launched in Aug. 1975 to investigate celestial objects emitting gamma rays and to measure time variations of such emission. It operated over the energy range 70 to 5000 MeV and performed so efficiently that the mission was twice extended, operations ceasing in 1982. See also gamma-ray astronomy. |
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