Astronomers have obtained the first compelling visual evidence confirming that a white dwarf star underwent a double-detonation supernova, a phenomenon long hypothesized but never directly observed until now. Using the European Southern Observatory’s Very Large Telescope (VLT), researchers captured images of the supernova remnant SNR 0509-67.5, located approximately 160,000 light-years away in the Large Magellanic Cloud. The images reveal two concentric rings, which indicate that the white dwarf exploded twice in rapid succession. The initial detonation was triggered by helium buildup on the star’s surface, followed by a second, more powerful explosion. This discovery provides new insights into Type Ia supernovae, which play a crucial role in cosmic processes such as the production of iron. The findings shed new light on stellar death mechanisms and contribute to a better understanding of these important cosmic events.