Labels:text | circle | art | screenshot | colorfulness OCR: According to the ancient Greek pl gher Aristotle, the cosm ios itself- isting of; lanets an had spheres rotated around at the'center of the universe. Each planet had its own sphere" concentric with the 'earth. Medieval philosophers revi: led Aristote's ideas) but; the core of his; hilo ophy remained basically onchanged ontil Leonardo's tima