When a supernova ... regions of the nebula, rather than from the center outward, Ko said, which adds further evidence to the idea that multiple regions are within the supernova remnant.

The Cat's Eye Nebula, also known as NGC 6543, is a planetary nebula in the Draco constellation that's about 3,262 light years away from Earth. NASA captured this stunning image of a runway star Zeta ...

It's the heart of the Crab Nebula, called the Crab Pulsar. About 1,000 years ago, astronomers recorded a supermassive star going supernova — exploding and spewing its blazing hot guts into space.