- a hero, the son of Zeus and Danaë, who slew the Gorgon Medusa, and afterward saved Andromeda from a sea monster.
- a northern constellation between Cassiopeia and Taurus, containing the variable star Algol.
- a son of Zeus and Danaë, who with Athena's help slew the Gorgon Medusa and rescued Andromeda from a sea monster
- a conspicuous constellation in the N hemisphere lying between Auriga and Cassiopeia and crossed by the Milky Way. It contains the eclipsing binary, Algol, and a rich cluster of galaxies
