Now we know why flying saucers rotate!

“A NASA probe orbiting Earth has confirmed two key predictions of Albert Einstein’s general theory of relativity, which describes how gravity causes masses to warp space-time around them. “…

 The experiment used four ultra-precise gyroscopes housed in a satellite to measure two aspects of Einstein’s theory about gravity. The first is the geodetic effect, or the warping of space and time around a gravitational body. The second is frame-dragging, which is the amount a spinning object pulls space and time with it as it rotates.”

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