Well, you have Aristarchus of Samos in the 3rd Century BC - but the Stoics didn't like it, so his heliocentric view didn't get popular. I wanted to find a writing from this guy: [1]http://users.uoa.gr/~etheodos/en_cv.html - who wrote EXACTLY about this topic back in 1999 for an astronomy conference, but because I'm not at a University.. I don't have access to it grumpy emoticon 15. Theodossiou, E., Danezis, E. and Manimanis, V.: "From Pythagoreans to Kepler. The contest between the Geocentric and Heliocentric System". Proceedings of the 9th European and 5th Euro-Asian Astronomical Society Conference (JENAM 2000), Astronomy of Ancient Civilizations. Moscow, Russia, May 29-June 3, 2000. *That* probably contains the _most up to date_ historical research on the matter... but... it's locked away in academic $$$ prison. UGH. References Visible links 1. https://l.facebook.com/l.php?u=http%3A%2F%2Fusers.uoa.gr%2F%7Eetheodos%2Fen_cv.html&h=zAQGfmyu6