Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 408
nsit of Ve-nus, we must find the means of somehow measuring theangular distance between the two positions which Venus occu-pies on the suns disc, as seen simultaneously from two widelydistant stations of known latitude and longitude. The meth-ods earliest proposed and executed depend upon… … Fig. 136.Contacts in a Transit of Venus. 517. Halleys Method, or the Method of Durations. — The method suggested by Halley, who first noticed, in 1679, thepeculiar advantages that would be presented by a transit ofVenus as a means of finding the suns distance, consists inobserving the duration of…
Astronomy · Constellations
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