Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 349
f thespectrum analysis ? ASTRONOMICAL PROBLEMS. 335 Although not in strict accordance with the plan of thiswork, it has been thought that a few astronomical problemsmight not be unacceptable to those students who possess aknowledge of Plane and Spherical Trigonometry. On thisaccount the following… … In figure 1, let EC represent the ecliptic, EO the equa-tor, and P the pole of the equator. Let A be the place ofthe sun, and PAD the arc of a great circle passing throughthe pole and the sun. Then EAD is a right-angled sphericaltriangle, right-angled at D, and AD is the suns declination,^AE its…
Astronomy
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