The elements of astronomy, physical and geometrical (1715)
Gregory, David, 1659-1708, Halley, Edmond, 1656-1742. Synopsis of the astronomy of comets, Adams, John, 1735-1826, former owner. BRL, Boston Public Library (John Adams Library) BRL · London : Printed for J. Nicholson ... and sold by J. Morphew ... · leaf 344
n, or the diftances from thePole, namely FA^F B, and by fuppofition,the Diftance AB of the Stars is given. Where-fore in the Triangle AFBy the Sides being^^ven, the Angle A TB will be found,^anTdconle-quently irs raeafure theArc CD; namely thedifference of the Right Afcenfions of the Stars-<^… … BookII. of AgTRpNpiviY. 297 the Circle of Declination pafling thro that^)gives the Right Afcenficn fought cf the other.And on the contrary, the Right Afcenfionsof the Stars A and B being given,; the differenceof them CD is alfo given; that is, the AngleCPBy whofe meafure that Arc is; And in…
Astronomy
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