The creation of the Cat?s Eye (part 1)

The animation (artist's impression) starts about 15,000 years before the birth of the Cat?s Eye Nebula by the emission of the bull's-eye pattern of rings, or shells, around the Nebula. This process continues up until some 1000 years ago where suddenly some change occurred and the Cat?s Eye itself was created.

Credit: NASA, ESA and Romano Corradi (Isaac Newton Group of Telescopes, Spain)