An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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flat rotation curve
  خم ِ چرخش ِ تخت  
xam-e carxeš-e taxt
Fr.: courbe de rotation plate  

A galactic → rotation curve in which the → rotation velocity is constant in the outer parts. The flat component is preceded by a rising curve that shows solid body rotation in the very center of the → galaxy. A flat rotation curve implies that the mass is still increasing linearly with radius. See also → dark matter.

See also: → flat; → rotation; → curve.