When planets do it, we say they are orbitting. Rainbows are just to look at, not to really understand. While the earth seems to be knowingly keeping its distance from the sun, it is really only centrificating. Someday we may discover how to make magnets that can point in any direction. South America has cold summers and hot winters, but somehow they still manage.
Most books now say our sun is a star.
But it still knows how to change back into a sun in the daytime. A vibration is a motion that can't make up its mind which way it wants to go. There are 26 vitamins in all, but some of the letters are yet to be discovered. Finding them all means living forever. There is a tremendous weight pushing down on the center of the Earth because of so much population stomping around up there these days.