Phrixus and Helle were the children of Athamas the King of Thebes. When their wicked
step-mother threatened to have them killed, they escaped on a magical flying ram with a golden
fleece. Helle was understandably alarmed by this experience, and fell from the ram into
the sea, but her brother Phrixus survived and landed safely in Colchis. There, he sacrificed
the ram to Zeus, who promptly placed it among the stars, while the King of Colchis
kept its golden fleece.