On July 4, 1054, a supernova explosion occurred, marking the death of a star thought to be nine to 11 times more massive than our Sun. This event was observed and recorded around the ancient world, ...

A glowing hand stretches across the cosmos, with its palm and fingers sculpted from the wreckage of a massive stellar explosion. The eerie structure is part of the nebula MSH 15-52, powered by pulsar ...