MPIA-HD, BIRKLE, SLAWIK / SCIENCE PHOTO LIBRARY MPIA-HD, BIRKLE, SLAWIK / SCIENCE PHOTO LIBRARY
Whirlpool Galaxy. Optical image of the Whirlpool Galaxy (M51, NGC 5194) and its companion galaxy NGC 5195 (above M51). M51 is a spiral galaxy whose arms contain hot, young stars (blue). These two galaxies are located around 15 million light years away from Earth, in the constellation Canes Venatici.
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