Perseus (constellation) may be derived from the Babylonian Old Man (MUL.SHU.GI) constellation, then associated with East in the MUL.APINan astronomical compilation dating to around 1000 BCE. In Greek mythology, Perseus was the son of Danaë, who was sent by King Polydectes to bring the head of Medusa the Gorgon — whose visage caused all who gazed upon her to turn to stone. Perseus slew Medusa in her sleep, and Pegasus and Chrysaor appeared from her body. Perseus continued to the realm of Cepheus whose daughter Andromeda was to be sacrificed to Cetus the sea monster. Perseus rescued Andromeda from the monster by
Cepheus of Ethiopia daughter Andromeda was offered up to the monster. The king chained the princess to a rock by the shore at the insistence of his people to be devoured by Cetus. Andromeda was saved from this fate when Perseus, flying home with his trophy (i.e. head of Medusa), had passed by the kingdom of Cepheus and noticed that a girl of wonderful beauty was chained to a rock by the seashore. Perseus fell in love with her at first sight and undertook to slay the monster if she would promise to marry him; or, in a slightly different version, he approached