A core principle of Einstein's general theory of relativity has just passed its most stringent test yet.
, was somewhat more rigorous than Scott's demonstration. It involved a satellite circling over Earth in orbit from April 25, 2016 until deactivation on October 18, 2018.
The experimental equipment used electrostatic forces to keep the two test masses in the same position relative to one another. If there was any difference in the acceleration – a metric known as theEarly results
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