Ibix
Science Advisor
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Ole Rømer studied the moons of Jupiter. He used them as a distant clock and ascribed their apparent tick rate variation solely to changing distance, from which he could deduce a speed of light. In a relativistic analysis of his work he was assuming slow clock transport, which is equivalent to assuming an isotropic one-way speed of light. So this is not a true one-way speed measurement either.kinsler33 said:Didn't someone calculate a reasonable value for c by astronomical observation?
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