We may suppose the point 0 to be assumed as the centre of the celestial sphere and at the same time as the centre of an imaginary terrestrial sphere described with a radius equal to the normal 0A (Fig. 11). Since the point 0 is in the verticalanbsp;...

Title | : | A Manual of Spherical and Astronomy |

Author | : | William Chauvenet |

Publisher | : | - 1864 |

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