hel·le·nis·tic as·trol·o·gy
/ˌhɛl.əˈnɪs.tɪk əˈstrɒl.ə.dʒi/
Hellenistic astrology is the earliest fully systematized form of Western astrology, developed during the Hellenistic period from roughly the 2nd century BCE to the 7th century CE. Emerging primarily in Greek-speaking cultural centers, especially Alexandria in Egypt, it represents a synthesis of Babylonian celestial omens, Egyptian observational practices, and Greek philosophical and mathematical thought.
Greek influence is foundational to this tradition: Greek language shaped its technical terminology, and Greek philosophy—particularly Stoicism and Aristotelian cosmology—provided the conceptual framework for fate, planetary causation, and cosmic order. Hellenistic astrologers developed many techniques still central to astrology today, including whole sign houses, sect, planetary joys, time-lord systems such as profections and zodiacal releasing, and structured dignity schemes. This system spread throughout the Mediterranean world, laying the groundwork for later Medieval, Renaissance, and modern developments in astrology.