Comet ISON shows off its tail in this 3-minute exposure taken on November 19, 2013, using a 14-inch telescope at the Marshall Space Flight Center.
The stars in this image are seen as trails because the telescope is tracking the comet to keep it in focus, causing the stars to blur during the minutes-long exposure.
At the time this image was taken, Comet ISON was some 44 million miles from the sun -- and 80 million miles from Earth -- moving at a speed of 136,700 miles per hour.
November 27, 2013 10:51 AM PST
Photo by: NASA/MSFC/Aaron Kingery
| Caption by: James Martin
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