In the morning twilight of 2013 November 15, Comet ISON (C/2012_S1), on its way to the sun, appears over Acacia trees in the Kenya’s Amboseli National Park at the foot of Kilimanjaro. Click on the second photo to see a deeper telephoto image of the comet tail as seen on NASA’s as seen on Astronomy Picture of the Day. ISON’s tail stretches over two degrees in this image of the November 15th. The enlarged negative version on the right makes details of the long tail easier to trace, including the tail’s separated filaments toward the top of the frame.



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