Greek astronomers were early scientists who studied the stars, planets, and the universe. They made significant contributions to our understanding of celestial bodies and developed models to explain their movements. Notable figures include Aristarchus, who proposed a heliocentric model, and Hipparchus, known for creating a star catalog and introducing the concept of celestial coordinates. These astronomers used careful observations and mathematical calculations to predict astronomical events. Their work laid the foundation for later developments in astronomy and influenced scholars in the Islamic Golden Age and the Renaissance. Their legacy continues to shape our understanding of the cosmos today.