Science project idea on how the sun’s energy is maintained.
Sun Energy Maintained Science Project Idea
 How the energy of the sun is maintained. From what you know, what is your conclusion as to the source of all heat, light, and activity upon the earth? If the sun should become cold, do you think that the earth would continue to revolve around it, and rotate upon its own axis? Would the moon revolve around the earth? Would there be any seasons? Explain your answers.
This sun to which we owe so much has a diameter a hundred times greater than that of the earth, but it is located 92,000,000 miles from us. Evidently the earth receives an extremely small amount of the total energy sent out by the sun. This amount has been calculated to be about 1 part in 2,000,000,000. Although the amount of energy that is
being given off is almost beyond our imagination, yet there seems to be no lessening of it. Scientists believe that the undiminished supply is maintained by the heat and light which are produced as the particles that make up the sun, which is less solid than the earth, are drawn toward its center by the force of gravitation; the energy of gravitation being changed into radiant energy. Therefore, it is believed that at present the radiant energy produced by contraction is equal to the amount of energy continually being given off by the sun. Of course, this cannot keep on forever, and in some future period, perhaps millions of years from now, the loss of energy from the sun will exceed the supply resulting from contraction, and the sun with its planets will gradually become dark and cold.
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