UNIVERSITY PARK, Pa., March 11 (UPI) -- A U.S. astronomer says a pair of newly discovered stars makes up the third-closest star system to the sun and is the closest discovered since 1916.
Penn State astronomy and astrophysics Professor Kevin Luhman, who made the discovery in star surveys conducted by the NASA-funded WISE satellite that was confirmed by ground telescopes, said the stars are "brown dwarfs," stars too small in mass to become hot enough to ignite hydrogen fusion.