Plato was a philosopher born in Athens, Greece. He believed that the "real world" wan not really the world that we were living in. He thought that the solar system was the center of the one and only universe to ever exist. Similar to the atom's structure, he believed that stars and planets were spun around the sun on orbitals. Plato also believed that there were four elements, water, air, fire, and earth similar to The Alchemists.