The Cat’s Eye Nebula
Eleven rings of gas make up this nebula which resembles a magic cat’s eye. The Cat’s Eye is a dying star that throws off shells of glowing gas.
In 2002, one of the stars in the constellation Monoceros suffered a sudden outburst. The star got so big that it became one of the brightest stars ever observed, but then it began to fade rapidly. Having passed through the dust shell, the light wave turned into light echo which can be seen using a telescope.