Page 28 - Curriculum Visions Dynamic Book

A star doing this is called a planetary nebUla. (Note that this term has nothing directly to do with planet formation; it is just a term carried down from the past when understanding was not as complete as it is today.)
Eskimo Nebula
 This is a planetary nebula, the glowing remains of a dying, Sunlike star called the “Eskimo” Nebula (NGC 2392). The bright central region is a bubble of material being blown into space by the central star’s intense “wind” of high-speed material. Scientists believe that a ring of dense material around the star’s equator, ejected during its red giant phase, created the nebula’s shape. The bubble is about 1 light-year long and about half a light-year wide. The Eskimo Nebula is about 5,000 light-years from Earth in the constellation Gemini. The nebula’s glowing gases produce the colours in this image: nitrogen (red), hydrogen (green), oxygen (blue), and helium (violet).
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