Why are the poles colder than that at equator, considering negligible distance difference from the sun?
The seasons are caused by Earth’s tilt, and warmer areas are the result of more direct sunlight. The negligible differences of Earth from the Sun have very little effect. The Sun is more directly positioned over the Equator. It moves from the Tropic of Cancer (23.5 degrees north) to the Tropic of Capricorn (23.5 degrees south). At the equinoxes, the Sun is directly over the Equator. It is never more than 23.5 degrees north or south of the Equator. The poles are 90 degrees from the Equator. This direct sunlight causes more heat in the Equatorial zone. In the temperate zones, it isn’t too far from direct, but, at the poles, the closest it ever gets to being directly overhead is 66.5 degrees off.
