In Greek mythology, Zeus lusts after Callisto, a nymph of Artemis. Hera, Zeus's jealous wife, discovers that Callisto has a son named Arcas, and believes it is by Zeus. Hera then transforms the beautiful Callisto into a bear . Callisto, while in bear form, later encounters her son Arcas. Arcas almost shoots the bear, but to avert the tragedy, Zeus turns Arcas into a little bear and puts them both in the sky, forming Ursa Major and Ursa Minor.
在希腊神话中,宙斯迷恋上了一个叫卡利斯托的宁芙、她是阿尔忒弥斯斯的女伴。宙斯的妻子赫拉嫉妒心很强、她发现卡利斯托和宙斯有个叫阿耳卡斯的儿子、赫拉随后把美丽的卡利斯托变成了一头熊。变成熊的卡利斯托与她的儿儿子阿耳卡斯相遇。就在不知情的阿耳卡斯要射杀变成熊的母亲时。为了避免悲悲剧发生。宙斯把阿耳卡斯也变成了一头小熊并把母子俩都置于天空中。这就是大熊座和小熊座!、