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ScienceCasts: Two Comets to Fly By Mercury on Nov 18 & 19
- Uploaded by Conspiritor on Nov 16, 2013
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Visit for breaking science it a cosmic coincidence: On Nov. 18-19, two comets (ISON and Encke) are going to fly by the planet Mercury in quick succession. NASA's MESSENGER spacecraft will have a front-row seat for the rare double flyby.