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Today

Hi83° Mostly Sunny

Tonight

Lo56° Mostly Cloudy then Slight Chance Showers

Wednesday

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Hi80° Mostly Sunny

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Saturday

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Saturday Night

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Comet ISON may sizzle this fall

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CHICAGO — When Adler Planetarium astronomer Mark Hammergren first heard the buzz about comet ISON last fall, he felt a familiar tinge of excitement.

The brightest comet in the last century. As vivid as a full moon in the night sky over Chicago. A once-in-a-lifetime, blazing spectacle.

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