Cassiopeia A Supernova ... Death Becomes Her Magnet

Cassiopeia A Supernova ... Death Becomes Her Cassiopeia A Supernova ... Death Becomes Her Located 10,000 light-years away in the northern constellation Cassiopeia, Cassiopeia A is the remnant of a once massive star that died in a violent supernova explosion 325 years ago. It consists of a dead star, called a neutron star, and a surrounding shell of material that was blasted off as the star died. The neutron star can be seen in the Chandra data as a sharp turquoise dot in the centre of the shimmering shell.