The Celestial Sea wheels into the east and southeast during September evenings. This group of constellations all relate to water. Capricornus, the sea goat; Aquarius, the water bearer; Piscis Austrinus, the southern fish; and Pisces, the fishes are in view as darkness falls. Cetus, the sea monster, and Eridanus, the river, follow behind them. They may share an aquatic theme because autumn was a rainy season in the ancient Mediterranean, where the constellations were named.