Comet ISON Seen By NASA Spacecraft | Video

The comet that may put on a spectacular light show during a November date with the Sun, was observed by the Deep Impact mission. The spacecraft has also had close fly-bys of comet's Tempel 1 and Hartley 2 and scientific observations of Garradd.
credit : NASA/JPL-Caltech/UMD (Tony Farnham)
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