Supernovae produce some of the most powerful explosions in the cosmos, expelling a doomed star’s contents at velocities reaching 10 percent the speed of light. It usually takes a few weeks or months for a supernova to fade into nothingness, but astronomers have now documented a record-setting case in which a star was extinguished in just a few days. Continue reading Rare Type of Supernova Extinguishes Star at Unprecedented Speed
Thirty million years ago in a galaxy not so far, far away, a star exploded. Three years ago, light from that explosion finally made it to Earth, where scientists watched the explosion unfold from start to finish.