Astrophysics (index)

Rotation Curve

(Galaxy Rotation Curve)
(function of orbital speed to orbital radius for a galaxy)

A Rotation Curve (or Galaxy Rotation Curve) is a function of the Orbital Speed of stars in the galaxy to their distance from the center of the galaxy. It is of interest for not showing the pattern expected from Keplerian Orbits based upon the mass viewed in the stars and clouds, and is a primary motivation for the concept of Dark Matter.

It is a factor in the concept of Kinematic Distance.