Alpha Centauri B

Proper noun.  (star) The brightest star in the southern constellation of Centaurus. Alpha Centauri is actually a binary star with Proxima Centauri as a third component. Alpha Centauri B is less bright than Alpha Centauri A and is somewhat less bright than our sun.

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This entry was last updated on RefTopia from its source on 3/20/2012.