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Comet Encounter

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Video thumbnail: Comet Encounter Official Trailer

Comet Encounter

Official Trailer

Airs December 25, 2013 at 10:00 p.m. ET/PT. Check your local listings.

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Official Trailer

0:30

Video thumbnail: Comet Encounter Official Trailer 2

Comet Encounter

Official Trailer 2

Follow a once-in-a-lifetime event — Comet ISON’s brush with the sun.

Official Trailer 2

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