This image shows the electron probability density distribution for an atom in the state: n=3, l=3, m=1. A small nucleus would be found at its core.

     This light intensity diagram emphasizes the shape of the stellar object IRAS 04302+2247, which is actually not identified as a planetary nebula, but rather as a "young stellar object". It is a particularly clear example of the "butterfly" morphology that is common in stellar shells, especially in planetary nebulae such as NGC 650-1 (see

Source: H.E. White, Physical Review, vol. 37, pg. 1423, 1931. Source: P.W. Lucas and P.F. Roche, Monthly Notices of the Royal Astronomical Society, vol. 286, pp. 895-919, 1997.