People made better telescopes and found more things in the sky — moons new planets and asteroids . But Jupiter never heated up and remains a cold, gassy goliath. To keep our yearly calendars consistent with our orbit around the Sun, every four years we add one day.
They are worlds, like the Earth. Earth was at a center of a series of concentric spheres containing the Moon, the planets, the Sun, and a final sphere of fixed stars.
We don't notice the pull from an apple because it is so much less than the pull from the Earth. They brought rocks and dirt back to Earth.
Sir Isaac Newton — By combining physics, mathematics, and astronomy, Newton developed the three basic laws of motion and the theory of universal gravity. We can compare pictures of distant stars with pictures of our own star, the Sun.
That is how rockets put astronauts into orbit.