The map of the sky and the 48 Greek constellations originated from two pre-Greek traditions. One tradition had 12 signs of zodiac having several associated animal constellations which were developed more around 3,200 to 500 B.C. in Mesopotamia.
The other tradition had large constellations which can be dated back to 2,800 B.C. from the Mediterranean region. Huge bears and serpents were included which represented celestial pole and equator at that time.
Astrology says that the positions of the planets and stars affect our daily lives. This is the reason our birth date determines our personality. The Babylonian zodiac calendar had more than 13 horoscopes signs, Egyptians took the idea.
Egyptian decans depicted 36 constellations that rose and fell, each indicating a new phase. Decans depicted healings and diseases; each phase held positives and negatives for health. This can be traced back to 2100 B.C.
Indian cultures adopted these theories. The Hindu nakshatras separate ecliptic into 27 to 28 sectors. Each sector is controlled by a lord who forecasts the life path of people within that sector. These calendars were available at the beginning of the last millennium B.C.
The Chinese zodiac is dependent on the lunar calendar and designates one of twelve animals to guide children born at that year. Chinese zodiac can be dated back to 475 B.C. The Romans and Greeks accepted this idea. The Greek astronomer Claudius Ptolemy, during A.D. 90 – A.D. 168, is the father of modern-day zodiac. This is known as the tropical zodiac. But Ptolemy’s ideas had flaws; his ideas didn’t’ include equinoxes. Now the astronomer says that the zodiac signs we know has no direct relationship with the zodiac constellations.
No matter what the belief regarding horoscopes are, zodiac is going to stay and people are going to use it to predict their future.