Alpha Centauri is a Triple Star System consisting of two somewhat sun-like stars closely orbiting each other and a red dwarf, Proxima Centauri, orbiting the stars in the center at a long distance. It is the closest star system to the Solar System. Civilization players have sent many spaceships here in attempts to win by Space Race Victory.
In DYOS, it appeared briefly in DYOS X when choxorn and some Elites stopped there on their way to Earth to eat burgers. More recently, Stylesrj and some of his characters went there to fight the Enclave and get info on Project Titan.
Main article: Chiron
The Alpha Centauri system has a planet named Chiron, which is not only the location of Sid Meier's Alpha Centauri, but also an Enclave research base.