Newton’s Law of Gravity

In looking at gravity as the cause of the moon’s circular motion, Newton came to the conclusion that the force of gravity had to be weaker at the moon’s distance than it was on the earth - otherwise the moon would have to be going much faster to stay in orbit.

In looking at gravity as the cause of the moon’s circular motion, Newton came to the conclusion that the force of gravity had to be weaker at the moon’s distance than it was on the earth - otherwise the moon would have to be going much faster to stay in orbit.