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Comet Encounter - Preview

  • Aired: 11/20/2013
  • 00:30
  • Rating: NR
Follow a once-in-a-lifetime event — Comet ISON’s brush with the sun.
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Comet Encounter - Preview
Comet Encounter - Preview
Airs December 25, 2013 at 10:00 p.m. ET/PT. Check your local listings.
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