Laplace, Pierre Simon, marquis de, 1749-1827, Bowditch, Nathaniel, 1773-1838, Bowditch, N. I. (Nathaniel Ingersoll), 1805-1861 · Boston, Hillard, Gray, Little, and Wilkins · leaf 949
so that the apparent polar distance 6 [33936] isequal to rP + P I=PI=PP nearly. Again, in the right-angled triangle KIP,we have KI— PK. sin. IP K= n . sin. A; then, by a property of the ellipsis [37Sf],and by construction [3397], we have, cos. h : cos. 2h::FP:FP:: KI( = n . sin. A) : IP = !L^i^ .… … V. i. § 14.] PRECESSION, NUTATION, OBLIQUITY OF THE ECLIPTIC. 925 Heretofore astronomers have not noticed the inequalities depending onthe angle 2v; but on account of the precision of modern observations,they ought not to be neglected. 14. We shall now resume the value of / [3098], and for…
Celestial mechanics · Tides · Capillarity
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