Zero-gravity meaning

A condition of apparent weightlessness such as that experienced in orbit or in free fall.
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A weightless condition in which an object appears not to be influenced by gravity because other objects in its immediate surroundings are undergoing the same acceleration.
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The condition of real or apparent weightlessness occurring when any gravitational forces acting on a body meet with no resistance so the body is allowed to accelerate freely. Bodies in free fall (including trajectories like orbits) experience zero gravity; bodies at rest on the Earth's surface do not, since they are subject to the counterforce of the surface supporting them.
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The state of apparent weightlessness which occurs in a very low gravity field, or in free fall.
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