A planetary nebula can result as a star with mass of less than several times the solar mass ("low mass" star) ejects mass in the red giant stage, near the end of the star's life. In this stage, the central part of the star, which is about the size of the earth, consists of a carbon ash core, a shell in which helium is fusing to carbon, and a shell where fusion of hydrogen to helium has temporarily ceased. The rest of the star's envelope has expanded to about 70 times larger than it had during most of its lifetime (almost the size of the orbit of Mars).http://fusedweb.llnl.gov/ this one flame from Apophysis 2.07 beta and from mutations / transforms . I left it large so the details can be seen thanks for viewing and any comments a recent post of mapps and richardphotos