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Comet C/2011 L4 (PANSTARRS)

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Comet C/2012 S1 (ISON)

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Web Extras

Explore dark nebulae

Take a tour of the Milky Way's barren areas.
By Michael E. Bakich
Published: November 28, 2005
Paolo Candy's image of the Snake Nebula (B72) on page 120 of the January 2006 issue of Astronomy reveals an area rich in both bright and dark regions. Dark nebulae are clouds of dust and cold gas that block light from more distant stars, creating visual voids in space.
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