The zodiac is derived from the Greek word meaning circle of animals. The zodiac is believed to have been developed in ancient Egypt and was later adopted by the Babylonians. Early astrologers knew it took 12 lunar cycles for the sun to return to its original position. They identified 12 constellations that they observed were linked to the progression of the seasons. Astrologers named the luncar cycles after relevant animals and persons. In Babylonia, for example, the rainy season was found to occur when the Sun was in a particular constellation. Therefore, this constellation was named Aquarius, or water bearer.