The rate of solar energy striking Earth averages 168 watts per square meter. The rate of energy radiated from Earth's surface averages 390 watts per square meter. Comparing these numbers, one might expect that the planet would cool quickly, yet it does not. Why not?

In summary, the Earth does not cool down quickly despite radiating more energy than it receives from the sun because factors like the greenhouse effect, albedo, and the role of the atmosphere help maintain its energy balance. The greenhouse effect helps retain heat within the Earth's atmosphere, preventing the planet from cooling down too quickly. The Earth’s albedo, or reflectivity, affects its ability to absorb solar energy and maintain a balanced temperature. The Earth's atmosphere also plays a critical role, acting as a blanket to retain energy and warming the lower layers. These factors combine to maintain the Earth's temperature despite the difference in incoming and outgoing energy rates.