The sun, a sphere, emits energy in all directions. The amount of solar energy that reaches the Earth’s outer atmosphere (the solar constant) is about 2.0 cal/cm2/min. But only a fraction of that energy reaches through to the Earth’s crust, due to cloud cover and atmospheric reflection. The amount of the Sun’s energy that we actually receive at ground level on Earth is far, far less than the amount that is emitted in our direction.
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