A death star’s ghostly glow

The eerie glow of a dead star, which exploded long ago as a supernova, reveals itself in this Hubble Space Telescope image of the Crab Nebula. But, the ghoulish-looking object still has a pulse. Buried at its center is the star’s tell-tale heart, which beats with rhythmic precision. The green hue has been added to give the image a Halloween theme.