Why does the moon have a decelerated velocity on one half of its orbit and on the other side it has an accelerated velocity. And why is this same with the earth. From my data the variances in velocities of earth affect the velocity variance of the moon. So I have been able to create a formula of ware the hill of the ellipse of the moon will be, and it works. But I cant understand why this accurse. My train of thought directs away from Albert Einstein’s frame dragging and more towards Johannes Kepler. This is because of the velocity vectors and the affects on objects in a hill sphere.