An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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giant molecular cloud (GMC)
  ابر ِ مولکولی ِ غولپیکر  
abr-e molekuli-ye qulpeykar (#)
Fr.: nuage moléculaire géant  

A massive complex of → interstellar gas and → dust, consisting mostly of → molecular hydrogen, that typically stretches over 150 light-years and contains several hundred thousand → solar masses. Giant molecular clouds are the principal sites of star formation. → molecular cloud.

See also: → giant; → molecular; → cloud.