Jupiter's Satellites and the Velocity of Light

Details Jupiter's Satellites and the Velocity of Light Jupiter's Satellites and the Velocity of Light

Jun 1917

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1917natur..99..345w&link_type=abstract

Nature, Volume 99, Issue 2487, pp. 345 (1917).

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Scientific paper

I SHOULD be grateful to any readers of NATURE who can find time to send me two postcards, one via Siberia and the other via U.S. America, telling me what is the most trustworthy interval of time between the eclipses of Jupiter's first satellite (sidereal revolution 1d. 18h. 28m.) when the earth and that planet are in conjunction and in opposition. Watson, on p. 503 of ``A Text-book of Physics,'' fourth edition, gives T-T' = 1992 sec., and Everett, on p. 82 of ``C.G.S. System of Units,'' gives as the best determination of the mean distance of the earth from the sun 1.49465(10)13 cm. If these figures are to be trusted, Römer's method of determining the velocity of light ranks second to none, as it yields the figure 3.0012(10)10 cm. per sec.

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