Test of General Relativity
Gravitational time dilation is a phenomenon predicted by the theory of General Relativity whereby time passes differently in regions of different gravitational potential. Scientists used the lander to test this hypothesis, by sending radio signals to the lander on Mars, and instructing the lander to send back signals. Scientists then found that the observed signals matched the predictions of the theory of General Relativity; see Shapiro delay.
Read more about this topic: Viking 1
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—Ralph Waldo Emerson (1803–1882)
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—Albert Einstein (1879–1955)