Perseus and Andromeda (Titian) was ruled by the beautiful but vain queen, Cassiope; she maintained that her beauty, and that of her daughter Andromeda, was superior to that of the sea nymphs, who were the daughters of Poseidon, the god of the sea. When the nymphs became aware of her claims, they protested to their father, who retaliated by calling up a Cetus or sea monster to ravage the coastline of Ethiopia placing Cassiope's kingdom at risk. On the advice of Jupiter Ammon, the Queen, together with her husband Cepheus, decided to sacrifice her daughter Andromeda to the monster. Perseus, flying back from his
Andromeda Galaxy Andromeda Galaxy The Andromeda Galaxy (), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way. Its name stems from the area of the sky in which it appears, the constellation of Andromeda. The 2006 observations by the Spitzer Space Telescope revealed that the Andromeda Galaxy contains approximately one trillion stars, more than twice the number of the Milky Way's estimated 200 to 400 billion stars. The Andromeda Galaxy's mass is estimated to be around 1.76 times that of the