A new manual of the elements of astronomy, descriptive and mathematical .. (1868)
Kiddle, Henry, 1824-1891 · New York, Ivison, Phinney, Blakeman & co.; Chicago, S.C. Griggs & co. · leaf 142
ere ? b. What is the length of theearths shadow ? How demonstrated ? ECLIPSES. 137 th« shadow, must be rfo of S E ; and therefore, S 0 must be \%$ of thewhole distance S E, and, of course, S E, {$% of S O; but O E, thelength of the shadow, is equal to S E— S 0; hence it is equal to yfo ofS O, or… … c. Length of the Moons Shadow.—This can be found by a similarcalculation. Let S (Fig. 88) be the centre of the sun, and O, that of themoon ; P will then be the end of the shadow, and O P its length; and,in the triangles ASP andOMP, A S :MO :: SP : OP. Now, MO isabout 3iT of A S ; hence O P is th of…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![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-353-245.webp)
