Zenith Data Systems — (ZDS) was a division of Zenith founded in 1979 after Zenith acquired Heathkit, who had, at that time, recently entered the personal computer market. Headquartered in Benton Harbor, Michigan, Zenith sold personal computers under both the… … Wikipedia
Zenith CH 2000 — Vue de l avion Type Ecole Motorisation Moteur 1 Lycoming O 235 N2C, 116 ch … Wikipédia en Français
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
Zenit (camera) — This article is about the Russian camera brand. For the astronomic or geodetic instruments directed to the zenith, see Zenith camera. : For other uses, see Zenit (disambiguation). Zenit is a Russian (and formerly Soviet) camera brand manufactured … Wikipedia
History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… … Wikipedia
Transit instrument — In astronomy, transit instruments are used for the precise observation of star positions. The instruments can be divided into three groups: Meridian instruments for observation of star transits in the exact direction of South or North: * Meridian … Wikipedia
Machines (video game) — Infobox VG title = Machines developer = Charybdis Limited publisher = Acclaim Entertainment designer = engine = version = released = 1999 genre = Real time strategy modes = Single player, Multiplayer ratings = ESRB: E platforms = Microsoft… … Wikipedia
Geodetic astronomy — is the application of astronomical methods into s and technical projects of geodesy.The most important topics are: * Establishment of geodetic datum systems (e.g. ED50) or at expeditions * apparent places of stars, and their proper motions *… … Wikipedia
Apparent places — The apparent place of an object is the position in space as seen by the observer. Because of physical and/or geometrical effects it has a deviation from the true position .In Astronomy the term apparent places of stars means the visual or… … Wikipedia
Astronomische Refraktion — Astronomische Refraktion: der Lichtstrahl (gelb) erscheint gehoben, gegenüber Vakuum wird der Zenitwinkel um r verkleinert (z = z − r ). Bei Satelliten macht die Refraktion wegen des kürzeren Strahls weniger aus (siehe unten). Unter… … Deutsch Wikipedia
