: Ptolemy defends astrology as a legitimate, though less certain, science compared to astronomy. He introduces the "powers" of the planets based on physical qualities—such as heat, moisture, dryness, and cold—and describes the nature of the zodiac signs.
Ptolemy systematically organized the astrological knowledge of his time into four distinct sections: Ptolemy's Tetrabiblos, Or Quadripartite
: The final book examines external life events, such as wealth, social status, marriage , and travel. Scientific and Philosophical Approach : Ptolemy defends astrology as a legitimate, though
: Here, Ptolemy moves to the individual, discussing factors present at birth that determine physical appearance, temperament, and parental influence. though less certain
He viewed astrology as a practical science similar to medicine—conjectural rather than absolute—because individual results could be modified by factors like race, upbringing, and geographical location. Historical Legacy