There are 10 celestial bodies that are the major planets in astrology. These are the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. The Personal Planets are the Sun, the Moon and the Earth. For us, in astrology, the Personal Planets act together to give us our personal perspective on life. We begin the study of the Inner Planets with Mercury--by way of today's education system.