Why Ptolemy was both an astronomer and an astrologer?

Ptolemy's full name is Claudius? Ptolemy was an astronomer, geographer, astrologer and optician. Ptolemy was born in Egypt under the Roman Empire in the 1 th century. His parents are Greek, and all his works are written in Greek. Ptolemy was also a scholar of ancient Greek civilization, because his time was the period when ancient Greek civilization spread and continued. Ptolemy stayed in the famous Alexandria for a long time, where he studied scientific knowledge and conducted scientific research. Through study and research, Ptolemy mastered a lot of scientific knowledge and wrote many scientific works.

Astronomical Masterpieces is one of his most important works, and it is also the only one that has been preserved to this day to comprehensively discuss ancient astronomy. The catalogue containing 48 constellations comes from this book. But many of the contents in this book are not Ptolemy's original works, but the research results of ancient Greek astronomer hipparchus. In the early stage of scientific development, the boundary between science and superstition was not very clear, and many phenomena could not be reasonably explained, so science and superstition were often mixed together. Because there are no precise instruments for observation and no precise mathematical tools for calculation, the ancient people's understanding of stars is often a combination of observation results, superstitions and legends. In this context, astrology came into being.

Astrology, also known as astrology, is a system that uses the relative position and motion of celestial bodies (especially the position of planets in the solar system) to explain or predict people's fate and behavior. It is the interpretation of nature and human beings by ancient humans without sufficient scientific knowledge. In ancient times, the data obtained by observing the starry sky was not only recorded as scientific knowledge, but also became the basis for astrologers to predict. Astronomers who study stars are usually astrologers. Ptolemy was one of them.

So it can be seen from the above explanation that Ptolemy was both an astronomer and an astrologer.