Colbert, E[lias] [from old catalog] · Chicago, G. & C. W. Sherwood · leaf 116
of motion in the orbit bears a well defined pro-portion to the distance from the body around whichthe revolution is performed. If the circumference of tha orbit be divided intolengths, as E F, H K, D C, in the accompanyingdiagram, each of which is passed over in the samespace of time, the product… … line or arc of a circle for its base, is half the pro-duct of the base into the height, therefore theareas of all the equal-timed triangles drawn in theorbit, as above, are equal to each other, and theplanet, or Moon, describes equal areas in equaltimes. 201. If equal areas are described in…
Astronomy · Stars
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