Zenith of an observer

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• Zenith distance — Distance Dis tance, n. [F. distance, L. distantia.] 1. The space between two objects; the length of a line, especially the shortest line joining two points or things that are separate; measure of separation in place. [1913 Webster] Every particle …   The Collaborative International Dictionary of English

• Zenith Angle — can refer to: * In astronomy, the angle made between the surface of the Earth and a line between the observer and the observed (see also zenith) * The Zenith Angle is a science fiction novel authored by Bruce Sterling …   Wikipedia

• Zenith Hourly Rate — is a concept used by meteor shower observers. It represents the maximum theoretical rate of meteors that would be visible to an observer, if the radiant of the shower was at the zenith and the sky was free of any light pollution. Because the ZHR… …   Wikipedia

• 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 — /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 (disambiguation) — The zenith is the point in the sky that appears directly above the observer. (opposite: nadir). In general, zenith may mean highest point , used in sentences like Mount Everest is the zenith of the world. Zenith may also mean:In aviation:* A… …   Wikipedia

• zenith distance — noun or zenith angle : the angular distance of a celestial object from the zenith measured by the arc of a vertical circle intercepted between the object and the zenith : the complement of the altitude * * * Astron. the angular distance from the… …   Useful english dictionary

• zenith fix — A fix obtained from any body close to the observer’s zenith. At local noon in the low latitudes (30°N and S), a sun fix is a zenith fix and is also called a noon fix. Plotting the zenith/noon fix …   Aviation dictionary

• zenith — noun /ˈzɛn.ɪθ,ˈzi.nɪθ/ a) The point in the sky vertically above a given position or observer; the point in the celestial sphere opposite the nadir. The 12 day wee had the wind high and large ſo that in two dayes ſaile we made the Sunne our Zenith …   Wiktionary

• zenith — n. 1 the part of the celestial sphere directly above an observer (opp. NADIR). 2 the highest point in one s fortunes; a time of great prosperity etc. Phrases and idioms: zenith distance an arc intercepted between a celestial body and its zenith;… …   Useful english dictionary

• zenith — noun Etymology: Middle English cenyth, senyth, from Middle French cenit, from Medieval Latin, from Old Spanish zenit, modification of Arabic samt (al ra s) way (over one s head) Date: 14th century 1. the point of the celestial sphere that is… …   New Collegiate Dictionary