"Celestial sphere" Quotes from Famous Books
 ... star, varies with the latitude of the observer, as will appear from Fig 2, and hence its value must be computed for different latitudes, and the surveyor must know his latitude before he can apply it. Let N be the north pole of the celestial sphere; S, the position of Polaris at its eastern elongation; then N S1 deg. 19' 13", a constant quantity. The azimuth of Polaris at the latitude 40 deg. north is represented by the angle N O S, and that at 60 deg. north, by the angle N O' S, which is greater, being ...
— Scientific American Supplement No. 360, November 25, 1882 • Various
... carried completely round the heavens once every twenty-four hours, had been accounted for by Ptolemy on the supposition that the apparent movements were the real movements. Ptolemy himself felt the extraordinary difficulty involved in the supposition that so stupendous a fabric as the celestial sphere should spin in the way supposed. Such movements required that many of the stars should travel with almost inconceivable velocity. Copernicus also saw that the daily rising and setting of the heavenly bodies could be accounted ...
— The Great Events by Famous Historians, Volume 9 • Various
... motions and nature of the stars, which it is useless to repeat. His addition to science, if he made any, was in treating the magnitudes and distances of the planets. He attempted to delineate the celestial sphere, and to measure time by a sun-dial. Anaximenes of Miletus taught, like his predecessors, crude notions of the sun and stars, and speculated on the nature of the moon, but did nothing to advance his science on true grounds, ...
— The Old Roman World • John Lord |
