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 260
o represent all the quantities on the figure, it hasbeen necessary to draw it so as to express the motion over aperiod of several thousand years. In consequence of this theangle CG^P, as represented in the figure, is negative, owing tothe motion of the pole P having carried the arc C^P over… … Fig 26. We divide the quadrangle into two triangles by the diagonalCgP, and then have or put eo=GoPo, the obliquity of the ecliptic at the initial epoch. ei = GgP, the obliquity of the equator of the epoch T to the initial ecliptic.6, the arc PqP joining the two positions of the pole. This arc is…
Spherical astronomy · Stars
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