Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 284
erefore, by Rule III. Art. 499 (as 60s. makelm., and 602 = 3600), it will fall but -^g^o of the distanceit would fall in one second at the Earths surface. Now, the Moon, being 240,000 miles from the Earthscentre, is just 60 times as far from it as an object at the How far would it fall in the same… … 278 UNIVEKSAL GKAVITATION. Earths surface is, and we have seen that it is affected bythe Earths attraction only -g-^-g- as much. Its distance is60 times greater, its gravity is 602 times less. Thus theforce of attraction is experimentally found to vary in-versely as the square of the distance. It…
Astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-217-133.webp)
