What were some of Ptolemy's achievements?

Related questions

1. What is Ptolemy best known for?
2. What happened to the son of Cleopatra and Caesar?
3. What is Ptolemy known for?
4. What happened to Cleopatra and Caesar's son?
5. How is Ptolemy?
6. What did Ptolemy accomplish?
7. Why was Ptolemy's theory important?
8. Was Cleopatra a descendant of Ptolemy?
9. What does Ptolemy mean?
10. What was Ptolemy's theory?

Tags

1. #universe
2. #theory
3. #mathematician
4. #earth
5. #believed
6. #geocentric
7. #astronomer
8. #center
9. #greek
10. #ptolemy