Einstein Gravity Probe B

Among the most exotic of Einstein’s predictions was that massive bodies — planets, stars or black holes —actually twist time and space around as they spin, much like the winds of a tornado. Other tenets of general relativity have been tested, such as the warping of time and space by massive bodies, but the twisting effect, known as frame dragging, has never been put to the test, scientists said. If Einstein is right, scientists say, the satellite should detect that small bits of time and space are actually missing from each orbit, something indiscernible to orbiting astronauts but measurable nonetheless.

Nasa launches Einstein Gravity Probe B - The Times of India

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