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Saturn’s Phoebe Ring is Even Larger than Thought

15 Jul 2015, 23:00 UTC
Saturn’s Phoebe Ring is Even Larger than Thought
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Saturn’s giant Phoebe ring, discovered in 2009, is believed to be formed by particles thrown off from Phoebe, a distant moon of Saturn whose surface is as dark as coal. When it was discovered, the Phoebe ring was observed to lie between 128 and 207 Saturn radii from the planet, with a vertical extent of 40 Saturn radii. A recent study published by Hamilton et al. (2015) using new observations from NASA’s Wide-field Infrared Survey Explorer (WISE) mission found that the Phoebe ring is much larger than previously measured.

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