There are 12 signs in the Ancient Zodiac and the Sun spends approximately one month in each. When each of us were born into this life, the Planets sat in a certain position in our skies. The Sun's position on this day therefore determines what is usually called our Zodiac sign, Star sign, Birth sign or Sun sign. Many believe that there is actually 13 signs in the Zodiac, the 13th being that of a Spider. There are also many various symbols attributed to the Zodiac, depending on culture and religions.