: a great circle of the celestial sphere passing through the celestial poles and the zenith. To track a star or to point toward a part of the sky requires a special instrument – an astronomer’s telescope called the transit circle. Of or at the highest point of prosperity, splendor, power, etc. What does meridian mean? The observer's upper meridian passes through the zenith while the lower meridian passes through the nadir. What is the definition of Meridian in astronomy? It is an axis in the altazimuth ... a dictionary, an atlas and several almanacs loaded with facts. In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location. Author: Burton, Marshall T. The meridian of time has been defined by one LDS apostle as "the middle or high point of that portion of eternity which is considered to be mortal time" ( MD, 1966, p. 486). Celestial Meridian The celestial meridian is the line on the celestial sphere joining the observer’s zenith (i.e. the half of such a circle included between the poles. a great circle of the earth passing through the poles and any given point on the earth's surface. (n) An imaginary great circle regarding the planet's surface passing through the North and South geographic poles. A (geographic) meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface, a coordinate line terminated by the North Pole and the South Pole, connecting points of equal longitude, as measured in angular degrees east or west of the Prime Meridian. For a location not at a geographical pole there is a unique plane in this axial-pencil through that location. https://en.wikipedia.org/w/index.php?title=Meridian_(astronomy)&oldid=1024052893, Creative Commons Attribution-ShareAlike License, This page was last edited on 19 May 2021, at 20:46. The meridian is an imaginary great circle on the celestial sphere that passes through the north and south celestial poles and an observer’s zenith. The angular east-west distance between the prime meridian (which passes through Greenwich) and a location on the Earth's surface. We need a system of celestial coordinates which is fixed on the sky, independent of the observer's time and place. With vs the stars about the North Pole neuer go downe, and those contrariwise about the Meridianneuer rise. Another way, the meridian is divided into the local meridian, the semicircle that contains the observer's zenith and both celestial poles, and the opposite semicircle, which contains the nadir and both poles. Meridian in AZ Dictionary. noun Astronomy A great circle passing through the two poles of the celestial sphere … The only thing I found that predates Patiot and refers to Vantasner Danger Merdian is a Youtube channel (named exactly "Vantasner Danger Meridian") with videos as old as 8 years ago (see edit #2). 3. any line of longitude running north and south on a map. (adjective) Dictionary ! This view is looking from the east towards the west for an observer in the Northern Hemisphere. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. Astronomy and Space Exploration > Astronomy: General > celestial meridian ; Cite. Restricting the telescope to motion only in the meridian provides an added degree of stability, but… At culmination, the object contacts the upper meridian and reaches its highest point in the sky. The definition of meridian is at midday or the greatest or highest point. The lower meridian is that part of the great circle below the horizon. 2. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location. This is also the moment when the Moon reaches its highest position in the sky. can be charted – an astronomical time-keeping system of sorts. Transit, in astronomy, the passage of a relatively small body across the disk of a larger body, usually a star or a planet, occulting only a very small area. Definition of celestial meridian. the point directly overhead) with the north and south celestial poles. All points on the same meridian have the same longitude. a line of longitude on the Earth, making up one half of an imagined circle. 2 (Astronomy) The relative coordinate system on the celestial sphere is defined relatively to an observer on the Earth: The Zenith is defined as the line running the observer straight up to the sky reaching the celestial sphere. meridian (plural meridians) 1. ən] (astronomy) A great circle on the celestial sphere, passing through the two celestial poles and the observer's zenith. Synonyms: peak, summit, climax, crest More Synonyms of meridian COBUILD Advanced English Dictionary. All points on a single meridian have the same longitude. An imaginary line encircling a globe at right angles to its equator and passing through the poles, or half of such a line. Mercury and Venus periodically transit the Sun, and a moon may transit its planet. A meridian transit occurs when an object moves across the meridian. See → prime meridian. The upper meridian is the semi-circle above the observer’s horizon, and the lower meridian is the semi-circle below the horizon. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. In the horizontal coordinate system, the observer's meridian is divided into halves terminated by the horizon's north and south points. In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location. The term meridian comes from the Latin meridies, which means both "midday" and "south", as the celestial equator appears to tilt southward from the Northern Hemisphere. Meridians are drawn on maps to help you describe the position of a place. Consequently, it contains also the north and south points on the horizon, and it is perpendicular to the celestial equator and horizon. A great circle on the celestial sphere passing through the celestial poles and an observer's zenith. Meridians, celestial and terrestrial, are determined by the axial-pencil of planes passing through the axis of Earth's rotation. Meridians, celestial and terrestrial, are determined by the axial-pencil of planes passing through the axis of Earth's rotation. from the horizon to the celestial equator. the great circle of the celestial … (mĕ-rid -ee-ăn) 1. What does prime-meridian mean? Time includes both the local time and the Moon's altitude at that moment. An object's right ascension and the local sidereal time can be used to determine the time of its culmination (see hour angle). (2) : the half of such a circle included between the poles. divides the horoscopewheel into an Eastern (1st and 4th quadrant) and a Western hemisphere(2nd and 3rd quadrant). [14th–19th c.] 3. In the case of the widely used WGS84, the meridianline for longitude0° is offset about 100 meters east of the world's prime meridiantraditionally marked by the Airy transittelescopeat the old Royal Observatoryin Greenwich, England. ; noun Either half of such a great circle from pole to pole. What's the origin of the Vantasner Danger Meridian? https://www.thefreedictionary.com/Meridian+(astronomy), Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Merida, Yucatan, Mexico - Merida International, Meriden and Wallingford Substance Abuse Council. Meridian A great circle passing over the zenith and through the celestial poles. Short for celestial meridian. (astronomy) b the great circle running through both poles. [14th–17th c.]quotations ▼ 1.1. (obsolete) Midday, noon. In the jargon of astronomers and celestial navigators, your local meridian is an imaginary semi-circle that crosses your sky’s dome from due north to due south. Extrasolar planets (e.g., … cases where the nearer object appears considerably smaller than the more distant object. meridian 1. a great circle that passes through the earth’s poles and any other given point on the earth’s surface. This section describes the celestial meridian and zenith. 2. half of such a circle. 1601, Philemon Holland, translating Pliny, The Historie of the World: 1.1.1. celestial meridian, vertical circle passing through the north celestial pole and an observer's zenith. For this, we change the fundamental circle. celestial meridian. The projection of the observer's terrestrial meridian on the celestial sphere. b : a … meridian. Definition of meridian. QI MERIDIANS. Study Astronomy Online at Swinburne University All material is © Swinburne University of Technology except where indicated. An observer's celestial meridian is not a fixed reference on the celestial sphere but rather changes with the observer's location on Earth. ∟ The Celestial Meridian and Zenith. A meridian is an imaginary line from the North Pole to the South Pole. It is the dispensation in which Jesus Christ lived in mortality. Positional Astronomy: Coordinate systems: the first equatorial or "HA-dec." system. ∟ Basics of Astrology and Astronomy. See this page in the original 1992 publication. Astronomy. Meridian The upper meridian passing through the north and south celestial poles, and the observer's zenith. The prime meridian is a reference line through Greenwich, England that measures longitude east and west. to noon] 1. from The American Heritage® Dictionary of the English Language, 5th Edition. (n) Either 1 / 2 of these types of outstanding group from pole to pole. (Entry 1 of 2) 1 a (1) : a great circle on the surface of the earth passing through the poles. 1. a one of the imaginary lines joining the north and south poles at right angles to the equator, designated by degrees of longitude from 0° at Greenwich to 180°. Meridian astronomy, in particular, is used to make correct measurements in the sky so that celestial bodies (stars, planets, etc.) I've tried searching on the web but pretty much everything leads back to Patriot. All Free. Sidereal day The time of 23 hours 56 minutes 4.09 seconds between successive appearances of any particular star on the meridian; essentially the true rotation period of the Earth. 2. meridian. There are several ways to divide the meridian into semicircles. Meridian of Time. Meridians are... | Meaning, pronunciation, translations and examples 2. Meridian (astronomy) synonyms, Meridian (astronomy) pronunciation, Meridian (astronomy) translation, English dictionary definition of Meridian (astronomy). The observer’s meridian is a great circle on the celestial sphere that passes through the north and south points of the horizon as well as through the zenith of the observer. The intersection of this plane with Earth's surface is the geographical meridian, and the intersection of the plane with the celestial sphere is the celestial meridian for that location and time. Consequently, it contains also the north and south points on the horizon, and it is perpendicular to the celestial equator and horizon. noun An imaginary great circle on the earth's surface passing through the North and South geographic poles. Meridian Passing: The three columns on the right all refer to the instant when the Moon passes the meridian of the selected location. n. See meridian. An imaginary great circle passing through a point on the surface of a body, such as a planet or satellite, at right angles to the equator and passing through the north and south poles. meridian - WordReference English dictionary, questions, discussion and forums. Meridian definition: A meridian is an imaginary line from the North Pole to the South Pole. Consequently, it contains also the north and south points on the horizon, and it is perpendicular to the celestial equator and horizon. (obsolete) The south. On any given (sidereal) day/night, a celestial object will appear to drift across, or transit, the observer's upper meridian as Earth rotates, since the meridian is fixed to the local horizon. For a location not at a geographical polethere is a unique plane in this axial-pencil through that lo… (mĕ-rĭd′ē-ăn) [L. meridianus, pert.
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