In astrology, Aquarius is an air sign. The air signs, which include Gemini, Libra, and Aquarius, are characterized as thinkers, communicators, and doers of the zodiac. They are intellectual, communicative, and prone to overindulging in fantasy. Aquarius, in particular, is described as the most ethereal and abstract of the three air signs, concerned with universal understanding and large-scale concepts. It is a fixed sign, meaning that it is hardened against outside influence, and is ruled by Saturn, the planet of order and discipline, as well as Uranus, the planet of sudden shake-ups, innovation, and progression