Hyperphysicists sometimes call Alpha Centauri a quadrinary star system. There is the primary Binary System composed of Cen A and Cen B that most people think of as Alpha Cenaturi. Then there is Cen C, often times called Proxima Centauri due to its proximity to Earth. And there is Sol. Earth’s own sun. Earth, Proxima Centauri, and the Alpha Centauri Binary System are linked through hyperspace in ways that few other stars are. That is why starships can travel from Earth to Alpha Centauri so much faster than from Earth to any other star. But the link to all of those other stars flows through Alpha Centauri. That is what makes it our gateway to the stars.