астрономический зенит
Точка пересечения отвесной линии с небесной сферой.
[ГОСТ 22268-76]
Англо-русский словарь нормативно-технической терминологии. academic.ru. 2015.
zenith — /zee nith/ or, esp. Brit., /zen ith/, n. 1. the point on the celestial sphere vertically above a given position or observer. Cf. nadir. 2. a highest point or state; culmination. [1350 1400; ME cenith < ML < OSp zenit, scribal error for zemt < Ar… … Universalium
zenith — The point on a celestial sphere directly overhead the observer. It is called the observer’s zenith. An astronomical zenith is where an imaginary plumb line through the observer and the center of the earth intersects the celestial sphere. A… … Aviation dictionary
Zenith camera — For the Russian camera brand sometimes referred to as Zenith , see Zenit (camera). Zenith cameras are astronomic or geodetic instruments which are directed exactly to the zenith. The stars are recorded either by photographic plates or by CCD… … Wikipedia
Astronomical clock — An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. DefinitionThe term is loosely used to… … Wikipedia
Astronomical seeing — Schematic diagram illustrating how optical wavefronts from a distant star may be perturbed by a layer of turbulent mixing in the atmosphere. The vertical scale of the wavefronts plotted is highly exaggerated. Astronomical seeing refers to the… … Wikipedia
Zenith telescope — A zenith telescope is an instrument adapted for the measurement of small differences of zenith distance, and used in the determination of astronomic latitude.Zenith telescopes are often portable; however the Monument to the Great Fire of London… … Wikipedia
astronomical triangle — noun : a triangle on the celestial sphere whose vertices are the pole, the zenith, and the observed body * * * the spherical triangle formed by the great circles connecting a celestial object, the zenith, and the celestial pole. [1915 20] … Useful english dictionary
astronomical triangle — the spherical triangle formed by the great circles connecting a celestial object, the zenith, and the celestial pole. [1915 20] * * * … Universalium
astronomical position line — A position line obtained by sighting a planetary body. From the geographical position, an arc is drawn which is equal to the zenith distance of the body. A tangent to this arc is the astro position line. To obtain a fix, either another astro, or… … Aviation dictionary
astronomical triangle — The spherical triangle formed by joining the observer’s elevated pole, his zenith, and the position of the body on the celestial sphere … Aviation dictionary
Quasi-Zenith Satellite System — Quasi Zenith satellite orbit QZSS animation The Quasi Zenith Satell … Wikipedia
