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Most people don't realize that the gravity on ISS is almost as strong as it is on the surface of the Earth. They're continuously falling toward Earth, going just fast enough to miss the ground.



Gravitational acceleration is approx 10% less? Based on the radius of the earth and the radial distance of the ISS.

Some nice discussion: http://physics.stackexchange.com/questions/29929/gravity-on-...




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