Astronomers capture first image of a white dwarf exploding twice in space Rare double-detonation seen in supernova remnant SNR 0509-67.5 structure A white dwarf supernova occurred without crossing the

Astronomers studying the remnant SNR 0509-67.5 have finally caught a white dwarf in the act of a rare “double-detonation” supernova, where an initial helium blast on the star’s surface triggers a second,