Astrology translates from anient Greece and literally translates to “speech” or “word”. It has evolved from its ancient origins and is still, to this day an important part of the lives those who believe. Astrology is largely based on an understanding of the relative positions of the stars and other celestial bodies and from that it is believed that this understanding translates into our daily lives to tell us things about relationships, personality and other importants information.
Those who practice astrology and dedicate their lives to it are refered to as astrologers and are seen as a source of guidance through their astrological understanding.
The Babylonians are generally acknowledged to have originated the practice and science of astrology. Their astrological charts enabled them to predict the recurrence of seasons and certain celestial events. So, in the beginning and for more than 2,000 years, astrology and astronomy were the same science. Babylonian astrology was introduced to the Greeks early in the 4th century BCE and, through the studies of Plato, Aristotle, and others, astrology came to be highly regarded as a science. It was soon embraced by the Romans (the Roman names for the zodiacal signs are still used today) and the Arabs and later spread throughout the entire world.
The zodiac (which is derived from the Greek word meaning circle of animals) is believed to have developed in ancient Egypt and later adopted by the Babylonians. Early astrologers knew it took twelve lunar cycles (i.e., months) for the sun to return to its original position. They then identified twelve constellations that they observed were linked to the progression of the seasons and assigned them names of certain animals and persons (in Babylonia, for example, the rainy season was found to occur when the sun was in a particular constellation which was then named Aquarius, or water bearer).
Around the year 2000 BCE, Babylonian astrologers believed that the sun, moon, and the five planets known at that time (Jupiter, Mars, Mercury, Saturn, and Venus) possessed distinct powers. Mars, for example, appeared to be red and was associated with aggression and war.
For more information on Astrology please see the Wikipedia article.