WIRED Space Photo of the Day: Smoky Rings in Space
 

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The hazy and aptly named Fine Ring Nebula, shown here, is an unusual planetary nebula. Planetary nebulae form when some dying stars, having expanded into a red giant phase, expel a shell of gas as they evolve into white dwarfs. ...http://feeds.wired.com/c/35185/f/661...c/sc/21/mf.gif
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