The International Astronomical Union simplified the designations of several stars that have multiple name variations. One of those stars is nearby Alpha Centauri which is now officially known by an older name - Rigil Kentaurus (meaning “foot of the centaur”).

Its neighbor Proxima Centauri (the closest star to ours) keeps its name though.

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I don’t think we need to retcon every use of Alpha Centauri from science fiction but maybe there will be a Sid Meier’s Rigil Kentaurus game someday.