Scientific terminology, in particular the Latin names for stars, uses the Latin genitive form of the name of the constellation; thus, "Alpha Centauri", where "Centauri" is the genitive of constellation name "Centaurus".
Scientific terminology uses the Latin genitive form of the name of the constellation; thus, "Alpha Centauri", where "Centauri" is the genitive of constellation name "Centaurus". This is in particular the Latin names for stars.