oximat-ing to the cr-bits of t! esuperior pla- Fig. 24. This gives the position of S, E, and M, in oneright line, in respectto longitude. Now byknowing the true angu-lar motion of the earthabout the sun (73), andthe mean angular mo-tion of the planet, * wecan determine the anglemSe, corresponding… … The relative gy means of apparent diameters, we can determine thevalues of the orbit. When the planet is in opposition to the p.anet from i a I the sun de- sun, at E (Fig. 24), measure its apparent diameter; and,termmed oy after a definite time, when the earth is at e, measure the ap- the v&na-…
Astronomy
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