In addition to the Earth, Astrology deals with ten planets, namely the Sun, the Moon (the two luminaries are considered planets in astrology), Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. … The personal planets are the Sun, the Moon, Mercury, Venus and Mars. Asteroids are used in astrology to fine tune themes brought up in the natal chart and also in synastry and mundane astrology. 

Minor celestial bodies, such as the Dark Moon, asteroids and the nodal axis, are also taken into account, and are addressed at the end of this chapter. Each planet has its precise function in the natal chart, and represents a specific energy. The planet’s action is influenced by the sign it tenants. It plays out primarily in the area of life indicated by the house where it is posited.

The planets are divided into two classes: personal planets, (or fast-moving planets), and collective planets (or slow-moving planets). The Sun and the Moon are viewed as Luminaries, but to keep it simple astrologers refer to them as planets.  In the Ancient teachings, Astrologers only used the first seven planets, due to the limitation of the 7th planet Saturn and the technical abilities to see beyond that.  They were the Sun, the Moon, Mercury, Venus, Mars, Jupiter and Saturn.