... Kepler's Supernova Remnant in X Rays . ... Recent X-ray data and images of Kepler's supernova remnant taken by the orbiting Chandra X-ray Observatory has shown relative elemental abundances typical of a Type Ia supernova , and further indicated that the progenitor was a white dwarf star that exploded when it accreted too much material from a companion Red Giant star and went over Chandrasekhar's limit . ... Publications with keywords: supernova - Chandra . ... A Supernova through Galaxy Dust . ...