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Bernard Beard
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Please stop talking about traveling beyond the pull of gravity! That propagates a gross misconception. Gravity in low Earth orbit is just slightly less than at Earth's surface (gravity is an inverse square force, after all). The reason you are in free fall in a circular orbit is that you are accelerating toward the center of the Earth at the same rate as demanded by the local gravitational field. The circular orbit speed is determined from v^2/R = G*M/R^2.... BBB
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Aug 26, 2010