STEREO Watches Comet ISON, Nov. 20-25, 201304:33

This movie from the spacecraft’s Heliospheric Imager shows Comet ISON, Mercury, Comet Encke andEarth over a five-day period from Nov. 20 to Nov. 25, 2013. The sun sits right of the field of view of this camera. Credit: NASA/STEREO
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