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Vertex(religion, spiritualism, and occult)
In geometry, a vertex is the pivot point of an angle. In astrology, the vertex is the point in a horoscope where the prime vertical intersects the ecliptic in the west. The antivertex is the corresponding point in the east. The vertex was discovered/invented by L. Edward Johndro and elaborated upon by Charles Jayne. The point where the vertex falls in a chart is said to be the most fated (i.e., least amenable to conscious choices) part of the horoscope. All major astrological chart-casting software programs allow one to calculate the vertex.
the point on the celestial sphere toward which the peculiar motions of stars are predominantly directed. There are two such points, diametrically opposed on the celestial sphere, with the galactic coordinates l = 344°, b -1° and l = 164°, b = 1°.
ii. In astronavigation, the vertex of a great circle is the point at which the great circle is nearest the geographic pole—that is, the point at which it reaches the maximum latitude. Every great circle has two vertices (one in each hemisphere). In the solution of great-circle sailing problems, only the vertex nearest the arc forming the great-circle track is considered.