Western Astrology: Astrological Compatibility Sagittarius: Sagittarius the archer is the ninth sign of the zodiac. It is a mutable fire sign. People born under this sign are fair, jovial, and competitive. They are the most idealistic of all the fire signs and seek justice as well as mercy in relationships, work, and other social situations. This sign is ruled by the gigantic planet Jupiter. The Sagittarius will do everything in a big way, and most of them love to travel to faraway places. They possess an interest in people from different cultures and backgrounds. more about Sagittarius Now please select your partner’s astrological sign: