The Astronomy: Callisto

=[Eratosthenes], Catasterismi Frag 1.2

The Great Bear (Arktos Megale) - Hesiod says she [Callisto] was the daughter of Lykaon and lived in Arcadia. She chose to occupy herself with wild-beasts in the mountains together with Artemis, and, when she was seduced by Zeus, continued some time undetected by the goddess, but afterwards, when she was already with child, was seen by her bathing and so discovered. Upon this, the goddess was enraged and changed her into a beast. Thus she became a bear and gave birth to a son called Arkas. But while she was in the mountain, she was hunted by some goat-herds and given up with her babe to Lykaon. Some while after, she thought fit to go into the forbidden precinct [abaton] of Zeus, not knowing the law, and being pursued by her own son and the Arcadians, was about to be killed because of the said law; but Zeus delivered her because of her connection with him and put her among the stars, giving her the name Arktos (Bear) because of the misfortune which had befallen her.