This distortion should cause the gyroscopes to wobble on their axes a phenomenon called precession.

ECONOMIST: A new satellite will test Einstein's magnum opus

Most scientists on both sides agree we are near the half precession point and solar energy at the earth surface in high summer at 65N is declining.

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This phenomenon is a spiral distortion of space which should if relativity is correct happen when massive bodies rotate. (In essence, such bodies drag space round with them.) Frame-dragging is predicted to cause an additional precession of one hundred-thousandth of a degree, perpendicular to that caused by the geodetic effect.

ECONOMIST: A new satellite will test Einstein's magnum opus