STEREO-A's Observations of Comet ISON
Date: 22 Nov 2013
NASA's STEREO-A spacecraft is monitoring comet ISON as it approaches the sun. This movie from the spacecraft's Heliospheric Imager shows comet ISON, Mercury, comet Encke and Earth over a two day period from Nov. 20 to Nov. 22, 2013. The sun sits right of the field of view of this camera.
Credit: Karl Battams/NRL/NASA STEREO/CIOC.