Callisto hid her pregnacy for a short time, but when she was found out Artemis was angry. She exiled Callisto from her.

Hera, Zues' wife took her revenge. She transformed Callisto into a bear. After the birth of her son, Callisto was killed in a hunt by Artemis.

Zues showed mercy to her. He placed Callisto in the sky as the constellation Ursa Major, or "great bear,".