A person who studies the positions and movements of stars and planets to predict human events and interpret personality traits.
From Greek 'astra' (stars) + '-logia' (study of). Astrology was serious science in ancient and medieval times before astronomy separated it as the mathematical study of celestial mechanics.
Astrologers were actually the first astronomers—tracking stars carefully enough to predict celestial events—and their star catalogues formed the foundation of scientific astronomy, even though their predictive claims didn't hold up scientifically.
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