The next question was — what makes planets go around the sun? At the time of Kepler some people answered this problem by saying that there were angels behind them beating their wings and pushing the planets around an orbit. As you will see, the answer is not very far from the truth. The only difference is that the angels sit in a different direction and their wings push inward.

chapter 1, The Law of Gravitation, p. 18: video - The Character of Physical Law (1965)

Richard Feynman - The.Character of Physical Law - Part 1 The Law of Gravitation (full version)