What’s the name of the star that is closest to our sun? July 18, 2014 by Karen Hill | Filed Under: Science Proxima Centauri, a.k.a. Alpha Centauri C is the closest star to our solar system. It’s 4.2 light-years away. RelatedWhat Kind of Star Is the Sun, What Is the Temperature of the Surface of the Sun, and How Was the Sun Formed?What Is a Light Year and How Long Does the Light From Our Closest Star Alpha Centauri Take To Reach Earth?Where Is the North Star, What Is the Name of the North Star, and Will the North Star Always Be the Polestar?