Sun Sign represents the Astrology Sign of the Zodiac that the Sun was in at the time of your birth. The Sun rules will power and the individuality. It represents the core of your potential and your distinctiveness as an individual. Sun shows the core of your potential and sets the direction you want to take in life. Your individuality is designated by the Sun sign while personality is designated by the ascendant sign in your chart at the time of birth. The Sun rules your essential personality, your ego and your willpower.