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单词 Solar Maximum Mission
释义
Solar Maximum Mission

Astronomy
  • A NASA satellite that observed solar activity at wavelengths from gamma rays to white light. SMM, also known as Solar Max, was launched in 1980 February. A failure of its pointing system after nine months led to a repair mission in 1984 April by Space Shuttle astronauts. SMM continued operations until it re-entered the Earth’s atmosphere in 1989 December.

    http://solarscience.msfc.nasa.gov/SMM.shtml NASA page on SMM and its findings.


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