The Orphics had a heliocentric model of the universe before Aristarchus; in fact, the Derveni Papyrus, one of the oldest witnesses to Orphic thought, is actually a commentary on Orphic literature that interprets it all as physical allegory. Only Dionysus knows where the Orphics got that stuff, along with what we now call astrology: from the Phoenicians perhaps? Someone synthesizing Babylonian and Egyptian observations?