Alpha Centauri is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil Kentaurus, Toliman, and Proxima Centauri. Proxima Centauri is the closest star to the Sun at 4.2465 light-years.
α Centauri A and B are Sun-like stars that together form the binary star system α Centauri AB. From Wikipedia
