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A supernova remnant with its components labeled. The center of the image contains a dense green cloud, shaped like a keyhole. A white line points to this area, labeled “inner ejecta (keyhole)”. Outside of this region are two, curved dotted lines with a white line pointing to the left one, labeled “crescent”. Outside of this cloud of gas is a ring of dense orange gas and dust that becomes more diffused as it travels further away from the center. A dotted blue line is overlaid in the center of this ring with a blue line that is labeled “equatorial ring”. The innermost part of this dense orange ring contains brighter orange clumps of glowing gas, which look like pearls on a necklace. There is a gray line pointing to one of these hotspots labeled “equatorial ring hotspots”. Outside of these structures, both above and below them, are very faint orange rings of gas and dust, forming a figure-eight pattern. They are overlain with dotted lines and both have white lines pointing to them, labeled “outer ring”. There are several white stars that are strewn throughout the image.