An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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spiral nebula
  میغ ِ مارپیچ  
miq-e mârpic
Fr.: nébuleuse spirale  

An obsolete term used to describe nebular objects with spiral shape before it was understood that they are independent galaxies lying outside our → Milky Way galaxy. Now called → spiral galaxy.

See also: → spiral; → nebula.