The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1872)
White, Charles J. (Charles Joyce), 1839-1917 · Philadelphia, Claxton, Remsen & Haffelfinger · leaf 177
ed to Ef, and theplanet to P; the angle E OE will be the amount of the apparentretrogradation of the planet in that time. The periods of theearth and the planet being known, we can compute the angularadvance of each planet in the given interval, thus obtaining theangles ESE and PrSP. The radius… … 170 MARS. which is the sum of PSO, or the advance of the planet, andPf OS, or the apparent retrogradation of the planet. We cantherefore compute the side SP, which is the distance required. If we suppose the real distance of the sun from the earth notto be known, this method will still give us the…
Astronomy
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