 Astronomers by period

The study of astronomy has a rich history with numerous astronomers who contributed significantly to the field across different periods. Here's a brief overview of some key astronomers categorized by historical periods: ### Ancient Astronomy (Before 500 AD) - **Claudius Ptolemy (c. 100 – c. 170 AD)**: Proposed the Ptolemaic system, which placed the Earth at the center of the universe. - **Aristarchus of Samos (c.