An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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spiral galaxy
  کهکشان ِ مارپیچ  
kahkešân-e mârpic
Fr.: galaxie spirale  

A galaxy with a prominent nuclear → bulge and luminous → spiral arms of gas, dust, and young stars that wind out from the nucleus. Masses span the range from 1010 to 1012→ solar masses.

See also: → spiral; → galaxy.