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As fascinating as the glowing Ring Nebula may be, it's really a sneak peek at what may happen when our sun shuts down.
http://www.huffingtonpost.com/2013/06/02/how-ring-nebula-formed-video_n_3361317.html?ir=Science&utm_campaign=060213&utm_medium=email&utm_source=Alert-science&utm_content=Photo
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