The earth is constantly being bombarded with energy from the sun. This energy reaches the earth in the form of . The earth itself releases most of its energy into space in the form of . The amount that it releases is directly proportional to the earth's to the fourth power. This means that an increase in the earth's temperature leads to an increase in the energy output of the earth in a feedback loop. The condition where the energy of the earth is constant is known as . In this state, the incoming energy would be the outgoing energy, leading to a constant temperature