What is the name of the closest star to planet Earth?
Hubble image of Proxima Centauri, the closest star to the Sun. NASA. The Sun is the closest star to Earth, about 93 million miles away. The Sunâs nearest neighbor, Alpha Centauri, is actually a triple-star system âthree stars bound together by gravity.Alpha Centauri A and B are two bright, closely orbiting stars with a distant, dim companion, Proxima Centauri.he Sunâs nearest neighbor, Alpha Centauri, is actually a triple-star system âthree stars bound together by gravity. Alpha Centauri A and B are two bright, closely orbiting stars with a distant, dim companion, Proxima Centauri.