According to the FAQ, the seasons are caused by the sun moving towards and away from the north pole. During the Summer (northern hemisphere), the sun is closest to the North Pole, making the Northern hemisphere warmer than the southern hemisphere. During the winter, the opposite is true. Now according to Newton's first law of motion, an object will remain in motion/rest until acted upon by an outside force. This means that in order for the sun to go closer to and farther from the North pole, a force needs to act upon it. What force is causing the sun to do this? What is making it suddenly travel away from the north pole, then towards it after a couple of months?