I am curious as to why the moon doesn't fall into the earth. Did a few searches and found: https://www.physicsforums.com/archive/t-58667_Why_doesnt_the_moon_just_fall_to_the_earth?.html But that doesn't explain one thing. Moons orbit is not an exact circle. Its "almost" circular. So when the moon is closest towards earth, shouldn't earths gravitational force on moon be stronger resulting in a spiral down-fall and eventally moon crashing into the earth? And a similar question: why doesn't the earth fall into the sun? Earths orbit is even more oblique. So shouldn't the sun attract earth with greater force when it is nearer on days of equinoxes and eventually lead to a spiral down fall too?