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Energy through gravity?
I know that this question has been dealt with before.
But I'm going to ask it in a different manner:
If we look at all the planets, stars, asteroids, galaxies and so on.
They are all somehow under the control of gravity.
If it is gravity that makes them move in their respective way,
is not then gravity a force by itself? And thereby, there is a source of energy behind that force?
My question/idea is simple: If everything in the universe is put in motion by gravity, shouldn't there be a way for us to "harness" that force and energy?
Can you imagine the amount of energy we could use?