To determine which house Aries is in your birth chart, you need to obtain your birth chart and locate the first house. The first house is often called the house of self and is ruled by Aries and the planet Mars. The first house represents the self, vitality, identity, appearance, and self-worth. Each house in astrology represents different facets of your life, based on the time and location of birth, and shows the gifts or obstacles you will face in this lifetime. To obtain your birth chart, you need to know your correct time of birth, as the houses rotate every 24 hours, and each house represents two hours of the suns apparent movement each day. Once you have your birth chart, you can interpret the houses and their corresponding zodiac signs and planets to gain insight into different areas of your life.