The Blue Ring Nebula, as seen in 2014 by the Galaxy Evolution Explorer, with its enigmatic ultraviolet rings colored blue NASA/JPL-Caltech; M. Seibert/Carnegie Institution for Science; K. Hoadley/Caltech/GALEX Team By Daniel CleryNov. 18, 2020 , 11:00 AM Astronomers believe they have solved the 16-year-old mystery of a star surrounded by […]