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Cancer in Greek Myths about Heracles - Windows to the Universe

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The constellation Cancer The Crab.
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Cancer

According to an ancient Greek legend, the figure of a gigantic crab was placed in the nighttime sky by the goddess Hera to form the constellation Cancer. Hera swore to kill Heracles, the most famous Greek hero.

Heracles committed a great crime and in order to be forgiven, he had to perform twelve difficult tasks. One of these tasks was destroying the terrible water-serpent, Hydra. The crab tried to help Hydra, but Heracles stepped on him.

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