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 268
tnficn of any point in theHeavens is an Arc of the Equator^ reckonedtowards the Eaft, intercepted between the be-ginning of Aries, and the point of the Equatorthat rifes, together with the faid point in theHeavens, in a Right Sphere: After the famemanner vve are to underftand what the… … Book U. ^/ A S T R O N O M ¥• 2 23 Sphere, what the aiFedions of this Sphere are^is evident from what has been faid above; (e-fpecially in Trot>. ^3. B,i.) namely, that theNights arc always equal to the Days, and everypoint of the Heavens is as long above as belowthe Horizon. In an Oblique…
Astronomy
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