Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 105
servations it became pos-sible to construct tables predicting the times of theseoccurrences. Roemer found, however, that when theEarth was near to Jupiter the eclipses occurred beforethe predicted times, but after them when the Earth wasmore than its mean distance from Jupiter. He ex-plained these… … 94 ASTRONOMY Earth, S and J the positions of the Sun and Jupiter,the distances to be traversed in these four cases areEJ, EJ, E3J, EJ : and it is clear that the difference between the times takento traverse E3J and EJ* gives twice the time itir takes for light to travelfrom the Sun to the— T Earth.…
Astronomy
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