According to Plutarch , Seleucus even proved the heliocentric system .
System is not known what arguments Seleucus used ( except that Seleucus correctly theorized on tides as a result of Moon 's attraction ) .
According to Plutarch , Seleucus even proved the heliocentric system , but it is not known what arguments he used ( except that he correctly theorized on tides as a result of Moon 's attraction ) .