The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 36
ASTRONOMY. 17 celestial sphere, it may have any value from 0° up to 360°.Right ascension corresponds to longitude on the earth, anddeclination to latitude. 15. The Meridian Circle. — The right ascension anddeclination of a heavenly body are ascertained by means ofan instrument called the meridian… … It consists essentially of a telescope mounted between twopiers, so as to turn in the plane of the meridian, and carry-ing a graduated circle. The readings of this circle areascertained by means of fixed microscopes, under which itturns. A heavenly body can be observed with this instru-ment, only…
Astronomy
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