In his “Metaphysics”, Aristotle tells us that Thales believed that everything comes out of water and that the earth floats on water. And according to Seneca, the philosopher used thefloating earth theory to explain earthquakes.
Anaximander. Anaximander was an ancient Greek philosopher born in Miletus in 610 BC. He is best known for replacing his teacher Thales's belief that everything is made up of water with his own concept of an eternal, unlimited entity known as the apeiron.
According to Kirk and Raven (1956), the ancient Pythagorean pentagram was drawn with two points up and represented the doctrine of Pentemychos. Pentemychos means "five recesses" or "five chambers," also known as the pentagonas — the five-angle, and was the title of a work written by Pythagoras' teacher and friendn.
He believed that the Earth was the center of the Universe. The word for earth in Greek is geo, so we call this idea a "geocentric" theory. Even starting with this incorrect theory, he was able to combine what he saw of the stars' movements with mathematics, especially geometry, to predict the movements of the planets.
Nicolaus Copernicus was a Polish astronomer who put forth the theory that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun. This is called the heliocentric, or Sun-centered, system.