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Galileo satellites prove Einstein's Relativity Theory:

Europe’s Galileo satellite navigation system – already serving users globally – has now provided a historic service to the physics community worldwide, enabling the most accurate measurement ever made of how shifts in gravity alter the passing of time, a key element of Einstein’s Theory of General Relativity.

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http://m.esa.int/Our_Activities/Navigation/Galileo_satellites_prove_Einstein_s_Relativity_Theory_to_highest_accuracy_yet