Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 245
ter reaching the stationaryposition, the planet begins to move westward, with decreaseof right ascension. It is then said to retrograde. The middleof the period of retrogression occurs at inferior conjunction foran inferior planet and at opposition for an outer planet. Theretrograde motion is… … ^s^QW 118. Explanation ofApparent Motions.—We can now show how theapparent motions can beexplained by the com-bination of the velocitiesof the Earth and the planet.In Fig. 76, S represents theSun, P and Q any two planets in conjunction on the sameside of the Sun, P and Q represent the corresponding…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
