A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 58
A PLANET. 93. The mean placeof a planet is the placeit would have occupiedhad it revolved in a cir-cular orbit, and withuniform velocity. The true place is thatwhich it really occupies,revolving as it does inan elliptical orbit, andwith unequal velocity. 1. In the cut, the dotted ellipserepresents… … 93. What is meant by the mean place of a planet ? The truepUce ? (When DIRECT AKD RETROGRADE MOTIONS. 55 2. From the perihelion to the aphelion, it will be seen that the true place is in ad-vance, or eastward, of the mean place ; while from aphelion to perihelion again, themean place is in advance…
Astronomy
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