A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 467
motion in the celestial pole to affect the position of theequator and equinox. To determine the actual apparent right ascen-sion and declination of a star for a given date (which is what wewant in practice), the catalogue place must be reduced to thedate in question; i.e., it must be corrected for… … Fig. 213. — The Photographic Telescope of the Henry Brothers, Paris. STAR-CHARTS. 455 useless for most purposes. Vice versa, the observations of a fixed star withthe meridian circle do not give its mean right ascension and declinationready to go into the catalogue, but the observations must be…
Astronomy
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