NASA's Hubble Space Telescope has made a surprising discovery. It's spotted a star system that may have left behind a "zombie star" after a supernova explosion that should have destroyed it.
A supernova occurs when a dying star essentially explodes. In the case of white dwarfs, it usually obliterates the star. Yet it turns out that in this case, a faint supernova may have actually left behind a surviving part of the dwarf star-essentially, a zombie star.