Earth Circumference Measurement by Posidonius

Michael Lahanas

Poseidonios or Posidonius of Syria ( Ποσειδώνιος ο Απαμεύς )

Griechische Astronomie: Die Messung des Erdumfangs nach Posidonius

A demonstration of the amazing progress of Astronomy, Astrophysics and Cosmology in the last decades

Ancient Greece

Medieval Greece / Byzantine Empire

Modern Greece