How Old Is Astrology?

I don’t know anybody who doesn’t know their horoscope sign or read their horoscope somewhere. Yes, many of them may believe in astrology, others just check it for curiosity.
Well, here is a Wikipedia information that will help you to understand better what astrology  is about.

Astrological beliefs in correspondences between celestial observations and terrestrial events have influenced various aspects of human history, including world-views, language and many elements of social culture.

Among Indo-European peoples, astrology has been dated to the third millennium BC (3 thousand years before Christ), with roots in calendrical systems used to predict seasonal shifts and to interpret celestial cycles as signs of divine communications. Until the 17th century, astrology was considered a scholarly tradition, and it helped drive the development of astronomy. It was commonly accepted in political and cultural circles, and some of its concepts were used in other traditional studies, such as alchemy, meteorology and medicine.

By the end of the 17th century, emerging scientific concepts in astronomy, such as heliocentrism, were irrevocably undermining the theoretical basis of astrology, which subsequently lost its academic standing.

In the 20th century astrology gained broader consumer popularity through the influence of regular mass media products, such as newspaper horoscopes.