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Re: NASA Missions Question.

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Posted by Zephram Cochrane/">Zephram Cochrane on November 15, 1999 23:22:59 UTC

: Does anybody know if NASA has done, or plans, any gravity related experiments in earth orbit. Also are any gravity experiments being done on any of the deep space probes?

LISA is being developed which will detect gravitational waves. Cesium clock experiments have been done confirming general relativistic time dilation due the earth's gravitational field. One that is not really intended as experiment, but in hindsight was a great one was global positioning satellites. In order to have the accuracy that they do they must compensate for a number of relativistic effects such as gravitational time dilation and special relativistic relative simultaneity.

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