Comet ISON Approaching

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Spata

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Estimates suggest that the nucleus of ISON is no larger than 4-6 km (3-4 miles) across while the comet’s dusty coma, or head of the comet is approximately 5,000 km (3,100 miles) across, or 1.2 times the width of Australia. A dust tail extends more than 92,000 km (57,000 miles).

Read more: http://www.universetoday.com/102257...ture-in-comet-isons-inner-coma/#ixzz2ggBigKOn
 

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