Before Aristotle's time, the only explanations of the Cosmos were based on mystic pictures of the world such as a landmass travelling through space on the back of a turtle.
Every culture has different legends of thier own.
Even before Aristotle, the idea that the Earth was round was well established. For 2000 years, even as Columbus sailed from Spain this had been established. Columbus did not prove this, contrary to what is taught in grade school.