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Perseus is a constellation in the northern sky named after Perseus, the mitological greek hero. Perseus is located in the northern celestial hemisphere. The brightest star in Perseus is Alpha Persei, that has an apparent magnitude (brightness as viewed from Earth) of 1.8. The best-known star in Perseus is Algol, which is known by its variability in brightness, that can be noted by the naked eye. Algol is a star system formed by multiple stars, of which two eclipses each other and creates the brightess variation. The Perseids are a meteor shower located in Perseus, that are proeminent during the months of July and August. Perseus' border constellations are: Aries, Taurus, Auriga, Camelopardalis, Cassiopeia, Andromeda and Triangulum. view more...