A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 321
hich is easily determinedwhen we know the approximate length of a single period) we get themean synodic period very closely, — especially if the two oppositionsoccur at about the same time of the year. Having the synodicperiod, the true sidereal period at once follows from the equation P ~ E S 515.… … Fig. 166. —Determination of tbe Distance of a Planet from the Sun. taken at an interval equal to its periodic time. The elongationof a planet is the difference between its longitude aud that of the TO FIND THE DISTANCE OF A PLANET. 309 sun, and a series of meridian-circle observations of sun and…
Astronomy
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