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A system of three or more stars bound together by gravity and orbiting a common center of mass, appearing as a single star when visible to the unaided eye.
(Astronomy) a system of three or more stars associated by gravitation. See also binary star
a system of three or more stars appearing as one star to the naked eye.
A system of three or more stars that usually orbit a common center of mass. The group appears as a single star to the unaided eye. Alpha Centauri is a multiple star.