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Loading contentThe twisting of spacetime by a rotating mass, which drags nearby matter and light around with it. Extreme near a spinning black hole, it creates the ergosphere; it is tiny near the Earth, where it was measured by the Gravity Probe B and LAGEOS satellite experiments — a direct confirmation of a subtle prediction of general relativity.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
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