A compendium of spherical astronomy with its applications to the determination and reduction of positions of the fixed stars (1906)
Newcomb, Simon, 1835-1909 · New York, The Macmillan company; London, Macmillan and co., ltd. · leaf 251
c rotates around anaxis JSfM (Fig. 23) in its own plane, determined by the conditionthat iV is a pole of the great circle joining two consecutivepositions of the pole C From the direction of the motion itwill be seen that the axis N, which we have taken as funda-mental, is at each moment the… … Fig. 23. Fig. 24 shows the effect of this motion of the ecliptic uponthe position of the equinox, supposing the equator to remainfixed. Here EN is the ecliptic and EQ the equator, as seen fromthe centre of the sphere, the observer at G in Fig. 23 looking inthe direction E. The rotation of the…
Spherical astronomy · Stars
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