Within the theory of astrology, the so called planets represent the dynamic archetypes or forms of personality, forms that are colored and modified by their placement in a certain zodiac sign or house, or through aspects. I write "so called planets", because not all the astrological planets are actual planets - the two most important in fact are the sun (a star) and the moon (a satellite). The astronomical bodies that qualify as planets are however all of importance in astrology. Another reason for the "so called" addition is that the astronomically significant qualitites of the planets such as their size, terrain, meteorology and distance from the earth are of lesser importance to astrology than the mythological ideas that stem from conceptions of gods and legends of the antiquity.
While the planets are the primary actors and archetypes of personality, it is the zodiac signs in which the planets fall and the aspects (distances, angles) between the bodies that color and modify their expression, that "dress" them and give them a special, recognizable character. Without these and other reference points within the natal horoscope, the planets have no astrological significance for the individual. Below, outlines of the ten most important bodies are drawn; it seems reasonable to divide the analysis of each planet into two: the general character and symbolical potentials of the planet, and secondly its significance and function within the personal horoscope.