Greek Heroic Age of the founding narratives of various city-states. They also became the ancestors of later heroes. The Phoenician prince Cadmus, was the first Greek hero. The grandson of Poseidon (through his father Agenor), he founded Thebes Perseus, famous for his exploits well before the days of his great-grandson, Heracles, was the son of Zeus. Perseus beheaded the Medusa, saved Andromeda from the sea monster Cetus, and was the legendary founder of Mycenae. Aeacus was also a son of Zeus. Bellerophon was descended from the nymph, Orseis. Oenomaus, king of Pisa, in the Peloponnese, was the son of Ares. The excellence of
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