and thus the two observationsare reduced to the same meridian, and equivalent to beingmade at the same time. The most favorable times for such observations, are whenthe moon is near her greatest declinations, for then the changeof declination is extremely slow. Let A ( Fig. 14) represent the place… … and finally, i/C* Now points of the observers. Let Mbe the position of the moon, andthe observer at A will see it pro-jected on the sky at m, and theobserver at B will see it pro-jected on the sky at m. Now the figure A C BM is aquadrilateral; the angle A CBis known by the latitudes of thetwo…
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-229-139.webp)
