<P> However, the Maragha school never made the paradigm shift to heliocentrism . The influence of the Maragha school on Copernicus remains speculative, since there is no documentary evidence to prove it . The possibility that Copernicus independently developed the Tusi couple remains open, since no researcher has yet demonstrated that he knew about Tusi's work or that of the Maragha school . </P> <Table> <Tr> <Td> </Td> <Td> The examples and perspective in this article may not include all significant viewpoints . Please improve the article or discuss the issue . (June 2015) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> The examples and perspective in this article may not include all significant viewpoints . Please improve the article or discuss the issue . (June 2015) (Learn how and when to remove this template message) </Td> </Tr> <P> Not all Greeks agreed with the geocentric model . The Pythagorean system has already been mentioned; some Pythagoreans believed the Earth to be one of several planets going around a central fire . Hicetas and Ecphantus, two Pythagoreans of the 5th century BC, and Heraclides Ponticus in the 4th century BC, believed that the Earth rotated on its axis but remained at the center of the universe . Such a system still qualifies as geocentric . It was revived in the Middle Ages by Jean Buridan . Heraclides Ponticus was once thought to have proposed that both Venus and Mercury went around the Sun rather than the Earth, but this is no longer accepted . Martianus Capella definitely put Mercury and Venus in orbit around the Sun . Aristarchus of Samos was the most radical . He wrote a work, which has not survived, on heliocentrism, saying that the Sun was at the center of the universe, while the Earth and other planets revolved around it . His theory was not popular, and he had one named follower, Seleucus of Seleucia . </P>

Who proposed the geocentric view which was accepted and used for over 18 centuries