We used to think the planets literally did little extra rotations, before we realized what was going on: https://en.wikipedia.org/wiki/Deferent_and_epicycle htt

We used to think the planets literally did little extra rotations, before we realized what was going on: https://en.wikipedia.org/wiki/Deferent_and_epicycle https://en.wikipedia.org/wiki/Deferent_and_epicycle