Planets in our sky make a loop pattern. For the most part this pattern is like how we have our own daily trail. The morning and evening commute, over time, our trail is pretty fixed in the same path. But every now and then we make a little side detour. Like going to a store or look at something interesting. This detour is like a little loop off the normal path–much like the planet making a loop off its path. But then we eventually regain our original path.