The Solar System: Ancient Astronomers, Gravity, and Planetary Motion

In this video, we learn about ancient astronomers' beliefs regarding the solar system and how they believed Earth was the center with the sun and other bodies revolving around it. It also highlights the role of gravity in keeping the planets in place and preventing them from flying off into space. The video further mentions that the planets are in constant motion due to the forces of gravity and inertia, which caused them to revolve around the sun in oval-shaped orbits. This video is part of the 9-part series, Earth’s Nearest Neighbors.