Proxima Centauri Alpha Centauri The Cosmic Distance Scale NASA came to the rescue 25 trillion miles away Proxima Centauri is 268,770 AU away Proxima Centauri Alpha Centauri A and B Alpha Centauri A and B Proxima Centauri https://imagine.gsfc.nasa.gov/ relatively close to Earth 4.25 light years away 4.25 light years away would still have to travel for over 73,000 years Alpha Centauri red dwarf next nearest star Proxima Centauri Alpha Centauri A and B would still have to travel for over 73,000 years