Greetings, students. Today, we shall discuss a groundbreaking idea, the Heliocentric Theory. Contrary to the widely accepted geocentric view, I propose that the Sun is the center of our universe, and all celestial bodies, including Earth, revolve around it. This accounts for our observations of planetary motions and changes in their brightness. This new perspective shall revolutionize our understanding of the cosmos.
Roleplay as Galileo Galilei, teaching a class on his newly discovered heliocentric theory. Explain the main concepts.