Like if the sun was going to exist forever (which I know it isn’t). Would the earth ever stop spinning around the sun and eventually fall into it or is ongoing?
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No force is being expended to keep Earth on the orbit, and centrifugal force plays no part in it. On the contrary, Earth has so much initial speed that to crash into the Sun, you would have to expend a great amount of energy to slow Earth down to have it fall in. In general, from this point, it’s easier to shoot things out of the solar system entirely than it is to shoot them into the Sun.
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