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 18
more or less irregular, is called the visible horizon, to distin-guish it from the true horizon defined above. We may alsodefine the horizon as the great circle where a plane whichpasses through the observers eye perpendicular to the plumb-line cuts the celestial sphere. 11. Vertical Circles and… … Fig. 2. —The Horizon and Vertical Circles.O, the place of the Observer.OZ, the Observers Vertical.Z, the Zenith; P, the Pole.SWiVE, the Horizon.SZPNy the Meridian.EZW, the Prime Vertical. My some Star. ZMH, arc of the Stars Vertical Circle. TMR, the Stars Almucantar. Angle TZM, or arc Sff, Stars…
Astronomy
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