The Sign rising over the horizon at the time of your birth is called the Ascendant, or Rising Sign. This, the first house of the horoscope, changes approximately every two hours. Even twins born as little as five minutes apart could have different ascendants, which would make a real difference in their horoscopes and so in their personalities.
The Rising Sign governs your outer personality, disposition and physical attributes, notably your appearance, carriage and general outlook. It represents your self-image and, to a considerable extent, how others see you. The sign and condition of the ascendant also affects your strength, vitality, health
issues and the types of illnesses you may experience. Its influence is powerful, but may be modified by any planets rising and the condition of the ruling planet. The placement of the Luminaries (Sun and Moon) and how they aspect the ascendant also affect the appearance.
The Rising Sign rules the first
house, so its ruling planet is usually designated the ruler of the horoscope. Unless poorly aspected or otherwise weak in comparison with other important planets, such as the planet ruling your Sun Sign (the Sun-ruler), this ruling planet is the most important one in your chart.
How to find your Rising Sign
To find your true rising sign you need to have your horoscope or birth chart calculated by an astrologer (click here to order your birth chart from this website), but you can work it out yourself without complex calculations by a rule of thumb, if you know your time of birth.