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Callisto and her son Arcas transformed as the Great Bear and the Bear Warden.
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Courtesy of Nova Development Corporation

Callisto and her son Arcas

Callisto was a river goddess. Callisto was the favorite companion of the moon goddess Diana. She used to accompany Diana on the hunt.

One day the god Jupiter saw the beautiful Callisto and fell in love with her. They had a boy named Arcas. Jupiter's wife Juno was mad and changed Callisto into a bear.

One day, Arcas shot an arrow at Callisto because he thought she was a bear.At the last moment, just before the arrow struck, Jupiter tossed Callisto and her son Arcas into the heavens as the star formations Ursa Major and Bootes. Ursa Major is known as the Great Bear, with Bootes, the Bear Warden. Arcas is always standing next to her.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA