Capricorn () is the tenth astrological sign in the zodiac, originating from the constellation of Capricornus. It spans the 270–300th degree of the zodiac, corresponding to celestial longitude. Capricorn is ruled by the planet Saturn. Under the tropical zodiac, the sun transits this area from December 21 to January 19 each year, and under the sidereal zodiac, the sun currently transits the constellation of Capricorn from approximately January 14 to February 14. In astrology, Capricorn is considered an earth sign, introvert sign, a power sign and one of the four cardinal signs. Its symbol is based on the Sumerian primordial god of wisdom and waters, Enki with the head and upper body of a mountain goat, and the lower body and tail of a fish. Later known as Ea in Akkadian and Babylonian mythology, Enki was the god of intelligence (gestú, literally "ear"), creation, crafts; magic; water, seawater and lakewater (a, aba, ab).