The comet in this image was discovered by Robert McNaught. In 2007, the spacecraft Ulysses flew through the tail of Comet McNaught (C 2009 R1), and found that the speed of the solar wind was smaller in the tail than the surrounding area. Again, this is not one image , but many short exposure shots combined into one so that everything would appear to be moving at the same speed. I suggest clicking on the link above and moving your cursor over the original image to see the comet without the background. At the time this image was taken in 2010, the comet was visible in the constellation Perseus with the help of a pair of binoculars.
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