3) By equating (3) and (2), and observing that the cosinesof very small arcs may be practically taken as unity, or ra-dius, therefore, /P-\-p\ sin. P sin. p sin. I —+^- ) = : --; \ 2 / sin. x >l . sin. P sin. p Or, sin. x = -r—— ——-. sm±(P-\-p) On applying this equation, we find #=57 3. * Let A… … 70 ASTRONOMY. Chaf u- Now if the moon has a real change in distance, as observa-tions show, such change must he accompanied with apparentchanges in the moons diameter; and, by directing observa-tions to this particular, we find a perfect correspondence;showing the harmony of truth, and the beauties…
Astronomy
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