A popular handbook and atlas of astronomy, designed as a complete guide to a knowledge of the heavenly bodies and as an aid to those possessing telescopes (1891)
Peck, William, Sir, 1862-1925 · New York, G. P. Putnam's Sons · leaf 172
e been lengthened by the stars velocity in travelling awayfrom our system. By this means the speed at which the stars are journeying in the line of vision, either fromor towards us, can be determmed with approximate accuracy; for the amount of displacement of the linesmeasured in the field of the… … Fig. 39. altitude axd azimuth instrument. OTHER ASTRONOMICAL INSTRUMENTS. Besides the instruments already mentioned for determining the positions of objects, there is the Altitudeand Azimuth instrument. As its name implies, this instrument is constructed for the purpose of determininghorizontal and…
Astronomy
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