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Space probe confirms general relativity

“We’ve tested Einstein’s universe, and Einstein survives,” said principal investigator Francis Everitt, at a press conference at NASA today to release the final results from Gravity Probe B, a spacecraft launched in 2004 to test predictions of Albert Einstein’s theory of gravitation. The new results, accepted for publication in Physical Review Letters, include a much-anticipated confirmation of frame-dragging, an effect in which the rotation of the Earth twists its gravitational field, causing gyroscopes orbiting in the field to wobble. 


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