Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 24
lestial meridian is, however, the greatcircle which passes through the zenith and the poles. The pointswhere this meridian cuts the horizon (the circle of level), arethe north and south points, and the east and west points of §16] THE VERNAL EQUINOX. 13 the horizon lie half-way between them, the… … Fig. 5. — Equator, Hour-Circles, etc. 0,place of the Observer; Z, his Zenith. SENW, the Horizon. POP, line parallel to the axis of the Earth. P and Py the two Poles of the Heavens. EQ WT, the Celestial Equator, or Equinoc-tial. X, the Vernal Equinox, or First ofAries. PXP, the Equinoctial Colure,…
Astronomy
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