The geocentric model is a debunked theory that the Earth is the center of the universe, with the sun and planets revolving around it. When you purchase through links on our site, we may earn an ...

Galileo’s Phases of Venus. Many of the diagrams Galileo Galilei (1564-1642) put in his Sidereus Nuncius (Starry Messenger) supported the heliocentric model by demonstrating the movements of ...