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.
Three or more stars forming one gravitational system that appear to be a single star or a binary star.
A system of three or more stars that are bound together by gravity and orbit a common center of mass. The group generally appears as a single star to the naked eye. Astronomers believe that most stars in the universe are part of multiple or binary systems. Alpha Centauri, the closest star to our Sun, is a multiple star system containing three bodies.