In a first, an image shows a dying star exploded twice to become a supernova
For the first time, astronomers have spotted a star that exploded not once, but twice. A new image of a roughly 300-year-old supernova provides visual evidence that some dying stars undergo a double explosion, researchers report July 2 in Nature Astronomy. Supernovas usually mark the death of massive stars. But medium-sized ones, like the sun,…
