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is a type of telescope designed to point straight up at or near the zenith, and used for precision measurement of star positions, to simplify telescope construction, or both. The
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The shadows of trees are the shortest on Earth when the Sun is directly overhead (at the zenith). This happens only at
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on its daily apparent path around a given point of observation. This sense of the word is often used to describe the
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The Sun reaches the observer's zenith when it is 90° above the horizon, and this only happens between the
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position, since at every latitude different stars pass one's zenith, or with other words lie on the
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At a given location during the course of a day, the Sun reaches not only its zenith but also its
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of the zenith ("zenith circle"). Zenith stars are not to be confused with "steering stars" of a
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Imaginary point directly above a particular location, on the imaginary celestial sphere
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Zenith stars (also "star on top", "overhead star", "latitude star") are stars which
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In a scientific context, the zenith is the direction of reference for measuring the
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does not have its own zenith and is at the zenith only if it is directly overhead.
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694:"We, the navigators : the ancient art of landfinding in the Pacific"
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is also determined by the zenith, and is defined as a circle on the
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349:, with the horizon perpendicular to the zenith. The astronomical
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172:), meaning "direction of the head" or "path above the head", by
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144:). The zenith is the "highest" point on the celestial sphere.
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directly "above" a particular location. "Above" means in the
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Diagram showing the relationship between the zenith, the
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Breve diccionario etimológico de la lengua castellana
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meant these telescopes could only point straight up.
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562:(in Spanish) (3rd ed.). Madrid. p. 144.
27:"Zenith angle" redirects here. For the novel, see
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357:that passes through the zenith, nadir, and the
537:(18th ed.). Cambridge University Press.
376:are both zenith telescopes, since the use of
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419:it allowed the navigator to determine their
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180:(during the 14th century), possibly through
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653:"Determining the Sacred Direction of Islam"
582:: CS1 maint: location missing publisher (
323:twice a year on 27/28 May and 15/16 July.
156:derives from an inaccurate reading of the
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534:Cambridge English Pronouncing Dictionary
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227:Angles and planes of a celestial sphere
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696:. Australian National University Press
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762:Dictionnaire étymologique du français
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657:Webpages on the History of Astronomy
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215:first appeared in the 17th century.
415:(pass) through the zenith. Used in
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899:Astronomical coordinate systems
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334:of that location 12 hours from
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269:, way, or level reached by a
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492:Horizontal coordinate system
321:qibla observation by shadows
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909:Astrological house systems
745:(5th ed.). Chemical.
718:Glickman, Todd S. (2000).
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603:Dictionary.com Unabridged
319:becomes the basis of the
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43:, and different types of
741:McIntosh, D. H. (1972).
743:Meteorological Glossary
720:Glossary of meteorology
290:zenith angular distance
239:on certain days in the
22:Zenith (disambiguation)
919:Orientation (geometry)
558:Corominas, J. (1987).
374:Large Zenith Telescope
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692:Lewis, David (1972).
670:Khalid, Tuqa (2016).
452:at Wikimedia Commons
429:sidereal compass rose
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472:Horizon zenith angle
417:celestial navigation
395:are used instead of
347:complementary angles
265:sometimes means the
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20:For other uses, see
487:Vertical deflection
450:Zenith (topography)
309:Tropic of Capricorn
275:position of the Sun
243:, where the trees'
467:History of geodesy
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140:at that location (
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130:vertical direction
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733:978-1-878220-34-9
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448:Media related to
313:Islamic astronomy
219:Relevance and use
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247:and the Sun's
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204:. Through the
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871:Solar System
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525:Setter, Jane
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169:samt al-raʾs
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859:Outer space
847:Spaceflight
811:Mathematics
407:Zenith star
257:Culmination
249:declination
182:Old Spanish
178:Middle Ages
160:expression
914:Topography
893:Categories
700:2023-06-01
610:2012-03-21
503:References
336:solar noon
255:See also:
251:are equal.
237:solar noon
206:Old French
134:plumb line
823:Astronomy
766:Le Robert
764:. Paris:
636:March 21,
578:cite book
435:compass.
421:latitudal
413:culminate
343:astronomy
330:, at the
261:The term
163:سمت الرأس
152:The word
625:"Zenith"
598:"zenith"
531:(eds.).
519:(2011).
497:Analemma
439:See also
433:sidereal
372:and the
351:meridian
332:antipode
307:and the
245:latitude
883:Science
799:Physics
785:Portals
462:Geodesy
457:Azimuth
383:On the
241:tropics
45:horizon
772:
749:
730:
566:
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389:zenith
263:zenith
213:zenith
209:cenith
196:, the
158:Arabic
154:zenith
148:Origin
52:zenith
835:Stars
431:of a
393:nadir
328:nadir
317:Mecca
311:. In
194:cenit
190:senit
142:nadir
41:nadir
770:ISBN
747:ISBN
728:ISBN
638:2012
584:link
564:ISBN
539:ISBN
401:down
399:and
391:and
296:(or
288:(or
186:samt
50:The
676:CNN
341:In
300:).
279:Sun
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684:^
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576:{{
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