14 gen 200 anni a. C. - Claudius Ptolemy 170 ce) was an Egyptian astronomer, mathematician, and geographer of Greek descent who flourished in Alexandria during the 2nd century ce. In several fields his writings represent the culminating achievement of Greco-Roman science, particularly his geocentric (Earth-centred) model of the universe now known as the Ptolemaic system.
Aggiunto al nastro di tempo:
Data:
14 gen 200 anni a. C.
Adesso
~ 2226 years ago