Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 111
Let Fig. 44 be a projection of the celesiial sphere on the plane of thohorizon. Z is the zenith, P thepole, EVQ the equinoctial, CL theecliptic, and Fthe vernal equinox.Let T be the position of the truesun in the ecliptic, and M that ofsecond mean sun in the equinoctial.The angle TPM is evidently… … CALENDAR. 105 second mean sun in the equinoctial is, by hypothesis, as shownin the previous article, equal to the angular advance of the firstmean sun in the ecliptic, it follows that the right ascension ofthe second mean sun is always equal to the longitude of thefirst mean sun, or, as it is…
Astronomy
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