According to astrology, celestial phenomena reflect or govern human activities, in a way that argues that the twelve signs represent twelve basic personalities or models of expression characteristic. Although we only know 12, there are actually 13 signs of the Zodiac, and the latter, not so give us to know.In the first two astrology, emphasizes the space, and the movement of the Sun, Moon and planets in the sky through each of the zodiac signs. In Chinese astrology, on the other hand, the emphasis is in time, with the Zodiac operating on cycles of years, months and hours of the day. A common feature of the three traditions, however, is the importance of the ascendant sign, i.e. the zodiac sign which is climbing ( according to the rotation of the Earth ) on the eastern horizon at the time of the birth of the person.