Velocity of Light and Measurement of Interplanetary Distances

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Science  01 Jan 1960:
Vol. 131, Issue 3392, pp. 31-32
DOI: 10.1126/science.131.3392.31


The combined availability of atomic clocks and of instrumented planetoids traveling in their own solar orbits will offer the possibility of determining their distance from us, and hence interplanetary distances, in terms of the wavelength of the radiation of atomic frequency standards. It can be anticipated that the accuracy of these measurements will be very high and will not depend upon our less accurate knowledge of the velocity of light in terms of the standard meter, the sidereal second, and so on.