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	ScienceCasts: Some Comets Like It Hot (NASA) View
	ScienceCasts: Comet of the Century (ScienceAtNASA) View
	ScienceCasts: Record-Setting Asteroid Flyby (NASA Video) View
	Comet vs. Mars: Will Atmospheres Collide \| Video (VideoFromSpace) View
	The Comet of the Century - Sungrazing Comet ISON - Science at NASA (Sherlock Holmes) View
	ScienceCasts: New Year's Fireworks from a Shattered Comet (ScienceAtNASA) View
	NASA ScienceCasts: The International Asteroid Hunt (ScienceAtNASA) View
	Collision Course A Comet Heads for Mars (VideoFromSpace) View
	Comet ISON Now In Amateur Astronomers' Range \| Video (VideoFromSpace) View
	Science Casts-Amateur Astronomers See Comet ISON Approaching the Sun (Our Science) View