NOAO / SCIENCE PHOTO LIBRARY NOAO / SCIENCE PHOTO LIBRARY
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False-colour optical image of interacting spiral galaxies NGC 4676a (left) and NGC 4676b, also known as "the Mice". Located 270 million light years away in the constellation of Coma Berenices, they are part of the Coma supercluster of galaxies. Their long "tails" are due to the tidal effects of their interaction as they pass in their respective orbits. The long, straight tail is straight only from our angle of view; in fact, it is strongly curved in the "horizontal" plane.
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