Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 382
n by meansof the moon. — the conic sections. — formula forthe mass of a planet. — elements of a planetsorbit. — danger from comets. — twilight. 491. Relation of Celestial Longitude and Latitude to RightAscension and Declination (supplementary to Art. 38).—In Fig.120 EC represents the ecliptic, and… … 362 APPENDIX. [§ 491 to the equator and the ecliptic. Let S be any star. Throughit draw KL and PR which will be secondaries respectivelyto the ecliptic and equator. Then the stars longitude is EL or A, and its latitude is SL or /?.In the same way the right ascen-sion is ER or a, and the…
Astronomy · Constellations
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