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Anonymous...I wish you would sometimes think before you post. Gravity simple does not exist, its clear. In the Theory of Gravity, gravity is caused by a force, since Einstein we know that there is no force and our old perception of gravity was flawed because we take a noninertial frame (accelerating) as inertial. Really, gravitation is not a force but acceleration (due to space time geometrics, yes). I suggest you read up on the equivalence principle, if you can understand physics that far.