An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Irr I galaxy
  کهکشان ِ بی‌سامان ِ گونه‌ی ِ I  
kahkašân-e bisâmân-e gune-ye I
Fr.: galaxie irrégulière de type I  

An → irregular galaxy that shows a hint of a spiral arm or bar, and can be placed at the far end of spirals in the → Hubble sequence.

See also: → irregular; → galaxy.