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Comet ISON will make an appearance in Earth's sky in November 2013 and is considered a "sungrazer," meaning that it will pass very close to the sun, which has some astronomers saying it could be as bright as the full moon or perhaps, even visible in daylight.
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ISON, Siding Spring, it's going to be an interesting couple of years. If ISON doesn't break apart after its close approach to the Sun, it should look glorious in the sky for several months. On the other hand, I'm looking forward to seeing whether Siding Spring will actually impact with Mars or not. :)
This may be the most exciting visable to the naked eye event, since the supernova of 1050.
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