During the course of a day to a viewer on a fixed point on earth, due to the earth's rotary movement the stars and their groups unfold in a circle, whose 360 degrees are divided into twelve segments. Each is termed a sign of the Zodiac. These are the twelve signs-ranging from Aries at the start to Pisces at the end. In Indian astrology they are referred to as Mesha, Rishaba, Mithuna,... and so on, ending with Kumbha and Meena.