Astronomers May Have Found the First Stars to Explode as a Pair

The Jellyfish Nebula, one of the most studied supernova remnants in the Milky Way, may have been concealing a sibling explosion all along. Astronomers now believe they have found evidence that a pair of stars exploded together, which would be a first-of-its-kind discovery. The finding could reshape our understanding of how binary star systems evolve and die.