Personal planet — Astrology glossary

Personal planets are the Sun, Moon, Mercury, Venus, and Mars, the bodies that move quickly through the zodiac and describe the most individual layers of a person. Because they change sign within days or a couple of years, their placements vary sharply from one birth to the next, so they carry the distinctive, person-specific information in a chart: identity, emotion, thinking, attraction, and drive. This matters because they are usually the first features an astrologer reads when building a portrait of someone, in contrast to the slow outer planets, whose positions are shared by everyone born in the same era. For example, two people born a week apart will likely share the same outer-planet signs but differ in their Moon or Mercury placement, which is where their personalities visibly diverge.