Reflecting telescope - Wikipedia, the free encyclopedia
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A reflecting telescope (also called a reflector ) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was in...
en.wikipedia.org/wiki/Reflecting_telescope
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Short stories that ESL teachers can use in their class ... The Gregorian Telescope is an interesting design of reflector and it was the first practical design for a telescope that used a mirror. It is still used in modern times but only in very limited circumstances.
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www.eslteachersboard.com/cgi-bin/stories/index.pl?read=...
www.eslteachersboard.com/cgi-bin/stories/index.pl?read=605
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The Gregorian telescope is named after the James Gregory design which appeared in his 1663 publication Optica Promota (The Advance of Optics). Similar theoretical designs have been found in the writings of Bonaventura Cavalieri ... in 1669, but was not successfully built until 4 years after Newton's first reflecting telescope...
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www.absoluteastronomy.com/topics/Gregorian_telescope
www.absoluteastronomy.com/topics/Gregorian_telescope
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In 1663, recognizing that the problem of chromatic aberration was not being completely eliminated by longer and longer refracting telescopes, the Scottish mathematician James Gregory published Optica Promota , in which he described the first practical reflecting telescope (now known as the Gregorian telescope).
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www.scienceclarified.com/scitech/Telescopes/The-First-T...
www.scienceclarified.com/scitech/Telescopes/The-First-Telescope.html
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We compare the diffraction-limited field of view (FOV) provided by four types of off-axis Gregorian telescopes: the classical Gregorian, the aplanatic Gregorian, ... The analysis is carried out with telescope parameters that are appropriate for satellite and balloonborne millimeter- and submillimeter-wave astrophysics.
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www.opticsinfobase.org/ao/abstract.cfm?uri=ao-41-22-466...
www.opticsinfobase.org/ao/abstract.cfm?uri=ao-41-22-4666
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Gregorian Telescope The first form of the reflecting telescope, invented by James Gregory, professor of mathematics in the university of St. Andrews. (1663. ...
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www.websters-online-dictionary.org/Gr/Gregorian+telesco...
www.websters-online-dictionary.org/Gr/Gregorian+telescope.html
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The Gregorian Telescop ... The form of reflecting telescope suggested by James Gregory (1638-1675) predates the familiar form of reflector which Isaac Newton (1642-1727) first designed and made in 1668. The problem with the reflecting telescope is how to view the image formed by the primary mirror.
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physics.kenyon.edu/EarlyApparatus/Astronomy/Gregorian_T...
physics.kenyon.edu/EarlyApparatus/Astronomy/Gregorian_Telescope/Gregorian_Telescope.html
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The Gregorian telescope was thought up in the 17th century by the Scottish mathematician James Gregory and made onlt ten years later. ... The second then reflects the ray back out of a gap in the middle of the first mirror and through the base of the telescope (as shown in the following diagram). Consequently,
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www.abdn.ac.uk/~u04jrm5/px2013/app.html
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Gregorian telescope (Opt.), a form of reflecting telescope, named from Prof. James Gregory, of Edinburgh, who perfected it in 1663. ... [1913 Webster] Note: A telescope assists the eye chiefly in two ways; first, by enlarging the visual angle under which a distant object is seen, and thus magnifying that object;
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onlinedictionary.datasegment.com/word/gregorian+telesco...
onlinedictionary.datasegment.com/word/gregorian+telescope
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