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 155
eat circle of the heavens, as marked out by the suns apparentyearly course, consisted of 360 spaces, each of which was traversed by the sun in the interval ofa day. This supposition is borne out by the fact that the old solar year contained only 3(50 days.Hipparchus, about 160 B.C., employed such a… … Fig. 22. the equatorialastrolabe. One of the most important of his inventions was the celebrated astrolabe {Figs. 22 and 23). Thisconsisted of a meridional circle, and several interior circles which could move about an axis. One of these, as in the instrument of Eratosthenes, was directed towards%…
Astronomy
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