Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 411
n with extreme precision, since it con-sists essentially in observing the absolute time of contact {i.e.,Greenwich or Paris time) at both stations. Suppose that an equatorial observer, E, Fig. 139, on oneside of the earth notes the moment of internal contact inGreenwich time, the planet being then… … Fig. 139. —De Ilales Method. the angle at D is at once determined by the time occupied byVenus in moving from V\ to V2. It is simply just the samefraction of 360°, that the time is of 584 days, the planets syn-odic period. If, for example, the time were 12 minutes, weshould find the angle at D to…
Astronomy · Constellations
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
