Astronomy was not only a major field of systematic study and thought in ancient Greece but the works of such great astronomers of the time as Eudoxus of Cnidus (408-355 BC), Aristarchus of Samos (310-230 BC), Eratosthenes (275-194 BC), Hipparchus of Rhodes (190-120 BC), Poseidonius (135-50 BC) and Claudius Ptolemeus (100-178 AD) laid the foundation for this all-important present-day scientific discipline and whose works and accomplishments are documented elsewhere on this site (see tagged names above).

For a thorough discussion on the life and ingenious work of Claudius Ptolemeus, the reader is referred to:

1. Οι Αστρονόμοι της Αρχαίας Ελλάδας (Σπανδάγου Ευαγ., Σπανδάγου Ρ., Τραυλού Δ., ΑΙΘΡΑ, Αθήνα, 2000, ISBN: 960-7007-60-3)
2. Αρχαίοι Ελληνες Αστρονόμοι (Ελευθεροτυπία, 2-Ιανουαρίου-2003)
3. Greek Astronomy (Heath T., Dover, New York, 1991, ISBN: 048-6266-20-6)
4. Claudius Ptolemeus (O'Connor and Robertson, online)