Astrology and astronomy were deeply intertwined, and very much one and the same throughout the overwhelming bulk of human history. The two completely separate disciplines as we define the today cannot in fact be distinguished until only the past few hundred years (they split up completely about 1750-1800), and because so many people mistakenly think that astrology is some kind of science, it often happens that the two are even today still very confused with one another.

Astrology and astronomy began to take divergent paths during the rise of the rational and the scientific method in the Western World. The science of astronomy as we know it today (mathematical, mechanical, empirical) is of relatively recent origin, this discipline having become separated from and generally antagonistic towards astrology only beginning around the time of the "Great Astronomers" -- Galileo, Kepler, Copernicus, Brahe, etc. (though remember that they were still all astrologers as well as astronomers). This period is defined as the beginning of the scientific revolution, leading on into the The Age of Enlightenment, sometimes referred to as the The Age of Reason -- as stated, the two fields diverged completely in the West between approximately 1750-1800.

Perhaps the words astrolomer/astrolomy or astronoger/astronogy would be sufficient to describe the afforementioned dual roles of just about every person seriously studying (astronomy) and interpreting (astrology) the sky from antiquity until about 1750-1800. In Medieval Europe the word Astronomia was often used to encompass both disciplines as this included the study of astronomy and astrology jointly and without a real distinction; this was one of the original Seven Liberal Arts.

Astrology and astronomy stayed together for a very long time - the funding from astrology supported major astronomical research, which was in turn used to make more and more accurate ephemerides for use in astrology. As the funding and technology progressively increased, this inexorably lead to greater and greater discoveries that eventually drove the two apart.

Most of the very early, ancient astronomers/astrologers up until about 1750-1800 were simultaneously employed as astrologers for the powerful and the wealthy; many Kings and Queens employed court astrologers to aid them in the running of their kingdom, and this is where most of the money that was used to fund much need astronomical research came from.

University medical students were taught astronomy/astrology for use during their practice as physicians; they needed to know how to observe (astronomically) in order to be able to interpret (astrologically) and treat the illness.

More often than not it was only because of the prospect of getting better and more accurate astrological predictions that the rich (Royalty) were willing to invest in the very expensive projects of creating observatories and funding constant astronomical observations (see Tycho Brahe) which were very time consuming and just didn't seem quite as interesting as the mystical art of astrology.

See also

• History of astrology
• History of astronomy
• Horoscope
• Natal chart