Astronomy - The Heliocentric Theory of Aristarchus of Samos 1980
Now showing: Greece - Postage stamps - 1980 - Astronomy - The Heliocentric Theory of Aristarchus of Samos - 2 stamps.
Now showing: Greece - Postage stamps - 1980 - Astronomy - The Heliocentric Theory of Aristarchus of Samos - 2 stamps.