It's a sad day for physics crackpots bent on disproving relativity, because once again, it turns out that Einstein was right.
The last bits of data collected several years ago by NASA's Gravity Probe B satellite have been analyzed, and the result is a resounding confirmation of two critical predictions of the general theory of relativity.
Perhaps you're thinking, "Wait a minute - NASA has a satellite up there testing the predictions of relativity?" Yes it does! NASA launched Gravity Probe B in April 2004, and these new results are the culmination of more than 50 years of effort.
Per Isaac Newton, the spin axis of a perfect gyroscope orbiting the Earth would remain unchanged for all eternity. But Newton saw gravity as a force between objects. Einstein re-envisioned gravity as arising from the warping of spacetime. That's the central tenet of General Relativity, and Einstein made several predictions that could be used to test the accuracy of his theory.
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One was confirmed right away: Einstein said that a ray of light passing near the sun would be deflected by a certain degree, because the sun's mass would warp the surrounding spacetime and the light ray would follow that curvature.