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Daily Archives: 1-April-2016
In November 2015, the European Space Agency (ESA) had a launch problem with two of its Galileo navigational satellites that resulted in both satellites being placed into highly elliptical orbits. ESA can burn some of the satellites’ station-keeping fuel to bring these orbits back to standard, but this will take some time. While the orbit adjustments are occurring, ESA will use the satellites to provide another test of Einstein’s general theory of relativity. Specifically, they will test the prediction that clocks will run slower the closer they approach a massive object. Continue reading →