The Ring Nebula
The true colors in this image indicate different layers of gases: helium (blue), oxygen (green), and nitrogen (red). The outline of the outer layer of cool nitrogen is represented by a dotted texture; the middle hot layer with oxygen has a texture of parallel lines, and the very hot center area of helium, with a star, has no texture.
Object Names: Ring Nebula, NGC 6720, M57
Image Type: Photograph
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