Gemini is the third astrological sign in the Zodiac, originating from the constellation of Gemini. In astrology, Gemini is considered a "masculine", positive (extrovert) sign. Perhaps the most dominant Geminian characteristic is versatility. It is also considered an air sign, and is one of four mutable signs. Gemini has been closely associated with the planet Mercury and is considered to be ruled by it. Being the third sign of the zodiac, Gemini has been associated with the astrological third house. Individuals born when the Sun was in this sign are considered Gemini individuals.