Each of Astrology's 10 planets, including the Sun and the Moon, rule a different aspect of your unique personality. The Sun has a starring role in your birth chart as the ruler of your outward personality, so Astrologers typically look to your zodiac Sun sign as the perfect place to start before digging deeper into your chart.
Calculating your Sun sign is easy, too, because all you need to know is what day you were born. (The only exception to this rule is if you were born on the cusp (very close to the day the Sun moves into a different zodiac sign), and then you will need to know your birth time to determine your true Sun sign.) The zodiac is divided into twelve signs. Which Sun sign are you?!