Recently, I have read a old book with an article about two kids arguing the problem of Sun. One day, Confucius heard two kids arguing on the road. One said "in the morning, the sun rises, it is closer to the ground and look as big as a roof of the carriage. In the afternoon , the sun is far from the ground and look like a dish. It is because an object at faraway place look smaller than the close." Another said " It should be reversed. In the morning, it is cooler ,but at noon, we seem to be living in the hot water. Since we are nearing a heat source, we feel hotter." Actually, who is right and why?