Astronomers have obtained the first visual evidence of a double-detonation supernova involving a white dwarf star, confirming a long-debated theory about Type Ia supernovae. Using the European Southern Observatory's Very Large Telescope (VLT) located in Chile, researchers captured images of the supernova remnant SNR 0509-67.5, which show two concentric rings indicative of two distinct explosions occurring in rapid succession. The first detonation is believed to have been triggered by helium buildup on the star's surface, followed shortly by a second, more powerful explosion. This discovery provides new insights into the mechanisms behind white dwarf star explosions and may have implications for cosmology and our understanding of stellar evolution. The findings were published in the journal Nature Astronomy and represent a milestone in astrophysics by visually confirming that some white dwarfs can explode twice before completely disintegrating.