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The constellation of Corvus (the Crow). Corvus is a small constellation which lies south of the west part of Virgo and is easily recognised by a quadrangle figure made by its four brightest stars (centre). In the Greek mythology a white crow was sent by the god Apollo to watch over his lover, Coronis. The bird failed to prevent Coronis from being unfaithful, and for this was cursed by Apollo who turned it black and put it in the sky for ever. (KEYSTONE/SCIENCE PHOTO LIBRARY/LUKE DODD)