Which star is closest to us? The closest star to us is Proxima Centauri. It lies at a distance of about 4.3 light-years or about 25,300,000,000,000 miles (about 39,900,000,000,000 kilometers). A car travelling at a speed of 60 miles per hour would take more than 48 million years to reach this closest star. Proxima Centauri is actually part of a triple star system which also includes the stars Alpha Centauri A and B. It is a small, red star which is about one tenth the size of our Sun.