How much light comes from the sun?



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    The sun creates energy via a reaction called nuclear fusion. Nuclear fuction occurs when two small atoms of hydrogen are pushed together and form a larger helium atom. Whenever this reaction occurs, energy from the sun is given off as heat and light.

    The Sun is 93 million miles from Earth, and the light given off from its surface takes 8 minutes to travel the distance.

    Dr. Louis Barbier (of NASA’s website) says that, “the Sun’s output is 3.8 x 1033 ergs/second, or about 5 x 1023 horsepower. How much is that? It is enough energy to melt a bridge of ice 2 miles wide, 1 mile thick, and extending the entire way from the Earth to the Sun, in one second.”

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