The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J. (Charles Joyce), 1839-1917 · New York, J. Wiley & sons; · leaf 91
* If we know the periodic time of Verms and that of the earth, the ratio of the distances of these two planets from the sun can be obtained by Keplers- Third Law Art. 117), that the squares of the periodic times of any two planets are proportional to the cubos of their mean distances from the sun.… … Fig. 36. of the earth. Let HK be that diameter of the earth which iyperpendicular to the plane of the ecliptic, and let an observer besupposed to be stationed at each extremity. In order to simplifjthe explanation, let us neglect the rotation of the earth duringthe observation, and suppose Venus to…
Astronomy
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