NASA's Hubble Space Telescope captured Cat's Eye Nebula (NGC 6543) which shows a bull's eye pattern of eleven or even more concentric rings, or shells, around the Cat's Eye. NASA captured stunning ...
The mystery begins at the end of the star's life, when it wraps itself in a cocoon by spilling out gas and dust. Sometime later, a butterfly-like nebula emerges from the cocoon and develops into a ...