ABSTRACT
Our sun, with a surface temperature of about 10,000°F, sends a constant stream of radiation energy into the space which surrounds it. The thermal radiation, which arrives at the Earth’s outer atmosphere is reduced, on a clear day after passing through the Earth’s atmosphere. The diameter of the Earth is about 7900 miles, and the distance around the Earth at the equator is about 24000 miles. The distance from the Earth to the sun is about the same distance as travelling around the Earth at the equator 3800 times. It takes light, travelling at 186,000 miles per second, over eight minutes to span the distance from the sun to the Earth. The Earth rotates around the sun. The axis of rotation of the Earth is tilted 23.45° relative to the plane of the Earth’s orbit. This tilt causes the seasons that are experienced on Earth.
