STEREO [Solar Terrestrial Relations Observatory] is a pair of telescopes parked in the L4 and L5 solar Lagrange points. These are along Earth orbit about 93 million miles ahead and behind us.
STEREO-A's Heliospheric Imager captured Comet ISON tracking left to right as it heads toward its close encounter of the hot kind: it will graze the sun on Thursday.
The video covers Nov. 20 to Nov. 22, 2013.
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Published on November 26, 2013 19:38