Binary star system

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Binary Stars


A binary star system contains two stars orbiting around their common center. Systems of two or more stars are called multiple star systems. These systems, especially when more distant, often appear to the unaided eye as a single point of light, and are then revealed as multiple by other means. The brighter star is officially classified as the primary star, while the dimmer of the two is the secondary (classified as A and B respectively). In cases where the stars are of equal brightness, the designation given by the discoverer is respected.


Example binary star systems are: Risa, Rigel, Sirius, and Talos