An Unblinking Eye

From small on when I looked up in the sky I would only see stars. I assumed that there were only clusters of stars with all sorts of sizes but never thought about other objects that can form not seen by the eye. For example this beautiful Cat's Eye Nebula (NGC 6543) seen from the Hubble Space Telescope. Who would have thought that clouds of gas and material ejected in pulses by a star can produce such magnificent image.

http://www.esa.int/spaceinimages/Images/2004/09/An_unblinking_eye