telescopes
91History of astronomical interferometry — See also: astronomical interferometerWilliam Herschel knew as early as 1779 (Herschel 1805) that stars appeared much larger in telescopes than they really were but he did not know why. When Thomas Young demonstrated interference and the wave… …
92European Southern Observatory — Infobox Organization name=European Southern Observatory caption = mcaption = type = research organization for astronomy headquarters = membership = 14 member countries language = leader title = leader name = leader title2 = leader name2 =… …
93National Optical Astronomy Observatory — The National Optical Astronomy Observatory (NOAO) is the United States national observatory for ground based nighttime ultraviolet optical infrared (OUVIR) astronomy. The National Science Foundation (NSF) funds NOAO to provide forefront… …
94Aperture synthesis — or synthesis imaging is a type of interferometry that mixes signals from a collection of telescopes to produce images having the same angular resolution as an instrument the size of the entire collection. At each separation and orientation, the… …
95Catadioptric system — A 150 mm aperture catadioptric telescope (Maksutov) A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric… …
96Sky-Watcher — Infobox Company company type = Corporation foundation = 1980 location city = Richmond, British Columbia location country = Canada industry = Technology company slogan = For people curious enough to look up and wonder. homepage = http://www.sky… …
97ASTRONOMIE ET ASTROPHYSIQUE — De tout temps, l’homme a été attiré par la voûte céleste, mais pas toujours pour essayer d’en percer les mystères. Il y a des milliers d’années, l’observation des astres lui servait seulement à marquer des étapes dans le déroulement du temps.… …
98W. M. Keck Observatory — Infobox Telescope name = W. M. Keck Observatory caption = The summit of Mauna Kea is considered one of the most important astronomical viewing sites in the world. The twin Keck telescopes are two of the largest optical/near infrared instruments.… …
99Refracting telescope — A refracting or refractor telescope is a dioptric telescope that uses a lens as its objective to form an image. The refracting telescope design was originally used in spy glasses and astronomical telescopes but is also used in other devices such… …
100Llano de Chajnantor Observatory — Llano de Chajnantor from Cerro Toco. APEX (left) and CBI (far center) can be seen …
