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Astronomical clock





Encyclopedia results for Astronomical clock

  1. Astronomical clock

    Image Prague Astronomical Clock Detail 1.JPG thumb 300px right Astronomical clock face and animated figures Prague Astronomical Clock An astronomical clock is a clock with special mechanism technology ... to refer to any clock that shows, in addition to the time of day, astronomical information. This could ... with astronomical regulator , a high precision but otherwise ordinary pendulum clock used ... driven astronomical clock for his clock tower of Kaifeng City. Su Song is noted for having incorporated ... September 2010 such as the castle clock a water powered astronomical clock by Al Jazari in 1206 ..., ref cite web last Whyte first Nicholas title The Astronomical Clock of Richard of Wallingford publisher ... and constructed in China in 1092. This great astronomical hydromechanical clock tower was about ... s Castle Clock Main Castle clock The most sophisticated Water clock water powered astronomical ... astronomical clock Image Cathedrale de Strasbourg Horloge Astronomique.jpg thumb 280px Strasbourg astronomical clock The Strasbourg Cathedral has housed three different astronomical clocks since .... This clock is housed in the case of the 2nd clock. It shows many astronomical and calendrical ... 200px Prague Astronomical Clock Main Prague Astronomical Clock See that article for an annotated diagram ..., Czech Republic . It is also known as the Prague Astronomical Clock Prague Orloj . The central ... Image Olomouc Astronomical Clock.jpg thumb 280px Olomouc astronomical clock detail Olomouc , the former ... astronomical clock on the main town square. It is a rare example of a heliocentric system heliocentric astronomical clock. Dating originally from 1420, the clock was remodelled approximately once ... in May 1945 they opened fire on the old astronomical clock, leaving only a few pieces that can ... of maidens. The Olomouc astronomical clock was featured in the opening scenes of the film The Joke based on the book by Milan Kundera. Astronomical clock of Taqi al Din The Ottoman Empire Ottoman engineer ...   more details



  1. Strasbourg astronomical clock

    File Stra burger Muenster Astronomische Uhr.jpg thumb 350px The Astronomical clock inside Strasbourg Cathedral Notre Dame de Strasbourg The Strasbourg astronomical clock is located in the Strasbourg Cathedral Cath drale Notre Dame of Strasbourg , Alsace , France . It is the third clock on that spot and dates from the time of the first French possession of the city 1681 1870 . The first clock had been ... series year 1896 page 171 ref Clocks First clock The first astronomical clock of Strasbourg cathedral was erected between 1352 1354, against the south transept. The name of its maker is not known. This clock was known as the Three Kings clock and had several automata. One of them was the gilded rooster, later reused in the second clock and which now is part of the collections of the Mus e des Arts ... in 1574. This clock was remarkable both for its complexity as an astronomical device and for the range ... Strasbourg Cathedrale Horloge detail.jpg 12 hour clock and cherub File Strasbourg Astronomical clock Comput ecclesiastique.jpg Computus work File Strasbourg Astronomical clock Equations.jpg Equations gallery See also Astronomical clock Notes reflist References commons category Strasbourg Astronomical clock Henry King Geared to the Stars the evolution of planetariums, orreries, and astronomical ... edition Berlin Diepholz 2000. DEFAULTSORT Strasbourg Astronomical Clock Category Strasbourg Category ... of the Holy Roman Empire . The current, third clock dates from 1843. Its main features, besides the automata ..., the Three Kings bowed before the figure of The Virgin Mary and the Christ Child. The clock most ... clock, and a staircase led to its various levels. Supports for former balconies can still be seen today, and suggest that the height of the clock was about 18 m 59 , with a width of about 7.70 m ... is not a remnant of the first clock. It was added at a later stage, for some unclarified reason. The entire structure was dismantled in 1572 4 when the second and even more ambitious clock ...   more details



  1. Astronomical clock (Besançon)

    File Horloge astronomique Besancon.jpg thumb 250px The astronomical clock in Besan on Cathedral The astronomical clock of Besan on is housed in Besan on Cathedral . Besan on s present astronomical clock ... by Bernardin in the 1850s, differs from those in Strasbourg astronomical clock Strasbourg , Lyon Cathedral Lyon and Beauvais Cathedral Beauvais . The clock is meant to express the theological concept .... Bernardin s clock The first astronomical clock installed in Besan on was made between about ... period constructed the astronomical clock at Plo rmel ref Bernardin had exhibited an astronomical clock ... M. Hanke Astronomical Clock of Besancon, thePuristS http horloge besancon.monuments nationaux.fr fr Monuments nationaux Horloge de Besan on fr icon DEFAULTSORT Astronomical Clock Besancon Category Astronomical ... et de l industrie expos s en 1849 , page 502 ref The clock he made for Besan on was exhibited in Paris in 1855, where V rit was also exhibiting and could certainly have seen it. This clock was described in the 1958 article by Ren Baillaud . V rit s clock By 1857 Bernardin s clock had stopped ..., who built it in his workshop in Beauvais. The clock was installed in 1860 but work on it continued ..., clock, for Beauvais Cathedral. Bernardin s clock may well provided a point of departure ... been copied from the earlier one. In 1900 the clock stopped working and was completely renovated by Florian Goudey. In 1966, the clock stopped again on the death of Paul Brandibas, who had been its ... working order. Description The clock stands 5.8 meters high and 2.5 meters wide, and has 30,000 mechanical ... the seconds, hours, days and years. The clock is a perpetual one that can register up to 10,000 years, including adjustments for leap year cycles. The clock also indicates the times of sunrise ... the Resurrection of Christ at noon, and his burial at 3 pm. The clock also has animated pictures of eight ... is part of the clock and it shows the motions and orbits of the planets. The planetary motions ...   more details



  1. Passemant astronomical clock

    File Pendule astronomique de Passemant 19 .JPG thumb Clockface The Passemant astronomical clock is an astronomical clock designed by Claude Simeon Passemant in the eighteenth century. ref name AllV It is displayed in the Salon de la pendule in the petit appartement du roi on the first floor of Palace of Versailles Versailles , France. The clock set the official time in France for the first time in the kingdom s history. ref name S&V cite journal language fr last Kergoat first Morgane year 2010 title Les plus beaux instruments des sciences l honneur journal Les Cahiers de Science & Vie issue hors s rie Les Sciences au ch teau de Versailles pages p.140 url http www.science et vie.com Sommaire.asp?Type CSV&num 119 ref File Pendule astronomique de Passemant 25 .JPG thumb Passemant astronomical clock Description The clock is an exceptional rococo work over convert 2 m in height, crowned with a moving celestial sphere. It shows the date, time, real time average phases of the moon and Heliocentrism Copernican planetary motion. The large astronomical dials mark the rising and setting of the sun and moon every day. Earth is represented by a bronze globe on which all countries are engraved with the main cities. This globe is placed among the rocks and waterfalls, which serve as a universal horizon. The mechanism is designed to be able to display the date until the end of the year 9999. ref name S&V Creators The clock mechanism was designed by engineer Claude Sim on Passemant 1702 1769 ... DEFAULTSORT Passemant Astronomical Clock Category Astronomical clocks Category Historical scientific ... by the French Academy of Sciences in August 1749, the clock was presented to Louis XV of France ... books.google.com books?id qosM6YrWB cC&pg PA62&dq Passemant astronomical clock&hl en&ei kZwiTrjGMcSe ... 20clock&f false ref The King acquired it the same year. In January 1754, the clock took its place among the astronomical clocks of Versailles. The fact that it was placed in the Salon de la pendule ...   more details



  1. Prague Astronomical Clock

    Image Prague Clock Tower.jpg thumb The clock tower The Prague Astronomical Clock or Prague Orloj lang cs Pra sk orloj IPA cs pra ski orloj is a medieval astronomical clock located in Prague , the capital of the Czech Republic , at Coord 50 5 13.23 N 14 25 15.30 E . The clock was first installed in 1410, making it the third oldest astronomical clock in the world and the oldest one still working. Description ... Town Square . The clock mechanism itself is composed of three main components the astronomical dial, representing the position of the Sun and Moon in the sky and displaying various astronomical details ... Clock, calendar, and animated figures The oldest part of the Orloj, the mechanical clock and astronomical ... Survey of the Reconstruction and Repairs of the Prague Astronomical Clock in the 19th and 20th Century ... AV Media . ref cite web url http blog.longnow.org 2010 10 13 prague astronomical clock 600th anniversary show title Prague Astronomical Clock 600th Anniversary Show Long Views The Long Now ... of the projection. This is commonly seen in astronomical clock s of the period. The small .... Image Prague Astronomical Clock.png thumb right 200px The clock tower on a Christmas night image ... portion gallery See also Antikythera mechanism Armillary sphere Astrolabe Astronomical clock Equation ... The... A Guide to the History and Esoteric Concept of the Astronomical Clock in Prague, Series Esoteric ... http www.orloj600let.cz http blog.longnow.org 2010 10 13 prague astronomical clock 600th anniversary ... Category Buildings and structures in Prague Category Astronomical clocks Category Clock towers Category ... 1490, the calendar dial was added and clock facade decorated with Gothic architecture gothic sculptures. In 1552 it was repaired by Jan Taborsk , clock master of Orloj, who also wrote a report on the clock where he mentioned Hanu as maker of the clock. The Orloj stopped working many times in the centuries ... Councillors so that he could not repeat his work in turn, he broke down the clock, and no one ...   more details



  1. York Minster astronomical clock

    Image York Minster astronomical clock.jpg right thumb The clock photographed in 2007. The York Minster astronomical clock was installed in the North Transept of York Minster in 1955. It was first conceived in 1944 and designed by R d E Atkinson , chief assistant at the Royal Greenwich Observatory . The clock is a memorial to the airmen operating from bases in Yorkshire, Durham, and Northumberland who were killed in action during World War II . Atkinson based the design on the appearance of the sun and stars from the viewpoint of a pilot flying over York. The mechanism and two dials were constructed by A C S Westcott and RGO craftsmen. Image York minster astro clock.png 400px thumbnail left The grid system of the York Minster astronomical clock. The front dial shows the locations of the sun and certain navigational stars as would be seen by a pilot flying south above York Minster. To locate his position, a fixed circular plate, about 62 cm in diameter and slightly dished, carries a ground plan of the Minster and surrounding markings representative of city walls, rivers, and principal roads. Since the edge of the plate represents the effective horizon, its centre identifies the pilot s nadir . Mounted behind the plate is a star planisphere, based on a north pole stereographic zenithal projection a projection from the north pole onto a plane passing through the south pole and perpendicular to the solar axis . This rotates once in a sidereal day on an axis passing through its south celestial pole and located some 13 cm above the centre of the horizon plate. For decoration it carries a few basic star patterns considerably distorted owing to the projection used and an eccentric zodiac ecliptic calendar ring faced with silver, and restricted in width to the distance between the solstitial ... King, Henry Geared to the Stars the evolution of planetariums, orreries, and astronomical clocks , University of Toronto Press, 1978 Category Astronomical clocks ...   more details



  1. CLOCK

    other uses Clock disambiguation PBB geneid 9575 Clock Circadian Locomotor Output Cycles Kaput is a gene encoding a basic helix loop helix PAS transcription factor CLOCK that affects both the persistence and Period physics period of circadian rhythms . CLOCK functions as an essential Activator genetics ... 80566 8 url issn ref Discovery and function The Clock gene was first identified in 1994 by Dr. Joseph ... Cloning of the Mouse Circadian Clock Gene journal Cell volume 89 issue 4 pages 641 653 year 1997 month April pmid 9160755 doi 10.1016 S0092 8674 00 80245 7 ref The Clock mutants discovered through ... Mutagenesis and mapping of a mouse gene, Clock, essential for circadian behavior journal Science volume ... that intact Clock genes are necessary for normal mammalian circadian function. CLOCK protein ... , newly synthesized CLOCK CLK is hypophosphorylated in the cytoplasm before entering the nucleus ... the life cycle of the circadian CLOCK protein. journal The Journal of biological chemistry date 2009 ... clock. ref name Hung 2009 A similar model is found in mice, in which BMAL1 dimerizes with CLOCK to activate ... on the CLOCK BMAL heterodimer to repress the transcription of per and cry . ref name pmid9616112 cite ... CJ title Role of the CLOCK protein in the mammalian circadian mechanism journal Science volume 280 issue 5369 pages 1564 9 year 1998 month June pmid 9616112 doi 10.1126 science.280.5369.1564 ref CLOCK ... CLOCK is a histone acetyltransferase journal Cell volume 125 issue 3 pages 497 508 year 2006 pmid ... that CLOCK mediated HAT activity is necessary to rescue circadian rhythms in Clock mutants. ref name pmid16678094 Mutants of Clock Clock mutant organisms can either possess a null mutation or an Muller s morphs antimorphic allele at the Clock locus that codes for an antagonist to the wild type ... upregulated by Clock . ref name pmid12015981 cite journal author Panda S, Antoch MP, Miller BH, Su ... of key pathways in the mouse by the circadian clock journal Cell volume 109 issue 3 pages 307 ...   more details



  1. Astronomical catalog

    An astronomical catalog or catalogue is a list or tabulation of astronomical object s, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. Astronomical catalogs are usually the result of an astronomical survey of some kind. Catalogs of historical importance See Star catalogue Abd al Rahman al Sufi Azophi s Book of Fixed Stars , published in 964, describes more than a thousand stars in detail and provides the first descriptions of the Andromeda Galaxy ref name NSOG Cite book last Kepple first George Robert coauthors Glen W. Sanner title The Night Sky Observer s Guide, Volume 1 publisher Willmann Bell, Inc. year 1998 isbn 0 943396 58 1 page 18 ref and the Large Magellanic Cloud . ref name obspm cite web title Observatoire de Paris Abd al Rahman Al Sufi url http messier.obspm.fr xtra Bios alsufi.html accessdate 2007 04 19 ref ref name obspm2 cite web title Observatoire de Paris LMC url http messier.obspm.fr xtra ngc lmc.html accessdate 2007 04 19 ref Johann Bayer s Uranometria Bayer designations star atlas was published ... objects and not a catalog in the astronomical sense. Other deep sky observing lists for amateur astronomers .... Widely used astronomical catalogs Hipparcos Catalogue containing data for about 118,000 stars ... ref cite web author USNO Master Clock Time Javascript must be Enabled url http www.usno.navy.mil ... Clock Time Javascript must be Enabled url http www.usno.navy.mil USNO astrometry optical IR prod ... 09 17 ref and related catalogs ref cite web author USNO Master Clock Time Javascript must be Enabled ... See also List of astronomical catalogues Star catalogue discusses various types in more detail Astrograph a type of instrument used to produce astronomical catalogues. References Cleanup link rot date July 2011 Reflist External links http cdsarc.u strasbg.fr viz bin Cat Most astronomical catalogues ... of Star Catalogues DEFAULTSORT Astronomical Catalog Category Astronomical catalogues astronomical catalogue ...   more details



  1. Astronomical Almanac

    The Astronomical Almanac ref Special Booksources 0118873377 Astronomical Almanac for the Year 2007, United States Naval Observatory Nautical Almanac Office, 2006 . ref is an almanac published by the United States Naval Observatory and Her Majesty s Nautical Almanac Office , containing solar system ephemeris and catalogs of selected stellar and extragalactic objects. The Explanatory Supplement to the Astronomical Almanac provides detailed discussion of usage and data reduction methods used by the Almanac. ref name Seidelmann Special Booksources 0935702687 P. K. Seidelmann editor , Explanatory Supplement to the Astronomical Almanac University Science Books, New York, 1992 . ref Publication history The Astronomical Almanac is the direct descendant of the British and American navigational almanacs. The British Nautical Almanac and Astronomical Ephemeris had been published since 1766, and was renamed The Astronomical Ephemeris in 1960. The American Ephemeris and Nautical Almanac had been published since 1852. In 1981 the British and American publications were combined under the title The Astronomical Almanac . ref http aa.usno.navy.mil publications docs asa history.php History of the Astronomical Almanac . United States Naval Observatory. ref See also American Ephemeris and Nautical Almanac specific title Astronomical Ephemeris generic article Almanac generic article Nautical almanac generic article The Nautical Almanac familiar name for a specific series of official British publications which appeared under a variety of different full titles for the period 1767 to 1959, as well ... Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac .... ref References Reflist External links http asa.usno.navy.mil The Astronomical Almanac Online official ... data and publications Category Physical constants Astronomy stub Physics stub ca The Astronomical Almanac de Astronomical Almanac es The Astronomical Almanac fa simple Astronomical Almanac ...   more details



  1. Astronomical engineering

    Another meaning is Engineering of Category Astronomical instruments astronomical instruments Engineering on an astronomical scale , or astronomical engineering , i.e. , engineering involving operations with whole astronomical objects planet s, star s, etc. , is a known List of science fiction themes theme in science fiction , as well as a matter of recent scientific research and exploratory engineering . ref Origins of existence how life emerged in the universe , by Fred Adams , Simon and Schuster, 2002, ISBN 0743212622, http books.google.com books?id 89fxlVBylfEC&pg PA153&dq 22moving a planet 22&hl en v onepage&q 22moving 20a 20planet 22&f false section Astronomical Engineering ref See also Planetary engineering Terraforming Astroengineering Stellar engineering References reflist Further reading cite journal first D. G. last Korycansky coauthors Laughlin, Gregory Adams, Fred C. year 2001 title Astronomical engineering a strategy for modifying planetary orbits doi 10.1023 A 1002790227314 journal Astrophysics and Space Science id Astrophys.Space Sci.275 349 366,2001 volume 275 page 349 http www.springerlink.com content r2526108gl6kl373 Astronomical Engineering Revisited Planetary Orbit Modification Using Solar Radiation Pressure , Astrophysics and Space Science , Volume 282, Number 4, 765 772, doi 10.1023 A 1021178603836 Category Exploratory engineering Category Science fiction themes ...   more details



  1. The Astronomical Journal

    Infobox journal title The Astronomical Journal cover File Astronomical Journal Cover.jpg editor John Gallagher III discipline Astronomy abbreviation Astro J. publisher Institute of Physics Publishing for the American Astronomical Society country United States frequency Monthly history 1849 present openaccess license impact 4.548 impact year 2010 website http iopscience.org aj link1 link1 name link2 link2 name JSTOR OCLC 194559707 LCCN sf78000620 CODEN ANJOAA ISSN 0004 6256 eISSN 1538 3881 The Astronomical Journal often abbreviated AJ in scientific papers and references is a Peer review peer reviewed monthly scientific journal owned by the American Astronomical Society and currently published by Institute of Physics Publishing . It is one of the premier journals for astronomy in the world. Until 2008, the journal was published by the University of Chicago Press on behalf of the American Astronomical Society . ref cite web title American Astronomical Society Selects Institute of Physics Publishing As New Publishing Partner publisher PR Newswire Europe Ltd. date 2007 04 25 url http www.prnewswire.co.uk ... Boss arranged to transfer responsibility for the journal to the American Astronomical Society. The first electronic edition of The Astronomical Journal was published in January, 1998. With the July, 2006 issue, The Astronomical Journal began e first publication, an electronic version of the journal ... The Astronomical Journal at Yale in Context with Before and After by Dorrit Hoffleit, The Astronomical ... Collections archives archives astrojrnl.htm Dudley Observatory, The Astronomical Journal http bibpurl.oclc.org web 8910 Scanned issues 1849 1997 from ADS DEFAULTSORT Astronomical Journal ... Category English language journals Category IOP Publishing academic journals de Astronomical Journal es Astronomical Journal fr Astronomical Journal it Astronomical Journal lb Astronomical Journal pl The Astronomical Journal pt Astronomical Journal ro Astronomical Journal zh ...   more details



  1. Astronomical League

    Notability Organization date August 2009 unreferenced date August 2009 The Astronomical League is an umbrella organization of amateur astronomy societies. Currently their membership consists of over 240 organizations across the United States , along with a number of Members at Large, Patrons, and Supporting members. The mission of the Astronomical League is to promote the science of astronomy through encouraging public interest via local astronomy clubs. The Astronomical League provides a number of observing awards to members locating and describing certain specified astronomical objects or events, and produces a periodical publication , The Reflector . The Astronomical League is an alliance organization of the Meade 4M Community who supports the League s National Young Astronomer s Award and the Leslie C. Peltier Award . Awards Awards given by the league include the Leslie Peltier Leslie C. Peltier Leslie C. Peltier Award Award , the Jack Horkheimer Jack Horkheimer Award Award and the National Young Astronomers Award . References Reflist External links http www.astroleague.org The Astronomical League http www.meade4m.com advisors astroleague index.html The Astronomical League Page on the Meade 4M Community Website Category Amateur astronomy organizations ...   more details



  1. Astronomical algorithm

    unreferenced date April 2010 Astronomical algorithms are the algorithm s used to calculate ephemeris ephemerides , calendar s, and positions as in celestial navigation or satellite navigation . Examples of large and complex astronomy astronomical algorithms are those used to calculate the position of the Moon . A simple example is the Julian day Calculation calculation of the Julian day . Numerical model of solar system discusses a generalized approach to local astronomical modeling. The variations s culaires des orbites plan taires describes an often used model. See also Astrodynamics Celestial mechanics Charge coupled device a data collecting device that is sometimes aimed at the sky and requires algorithms to process its output Doomsday rule List of algorithms List of astronomical objects Jean Meeus Meeus, Jean Transformation from spherical coordinates to rectangular coordinates http www.sunlit design.com products thesunapi documentation funcref.php?indexref 4 An implementation of Astronomical Algorithms. Calculate MJD, Equation of Time and Solar Declination in Excel, CAD or your other programs. The Sun API is free and extremely accurate. For Windows Computers. Category Astrodynamics Category Computational physics Category Calendar algorithms pt Algoritmo astron mico algorithm stub astronomy stub ...   more details



  1. Astronomical complex

    An astronomical complex or commemorative astronomical complex is a series of man made structures with an astronomical ... show high precision astronomical alignments. ref name Laporte1993 cite book author Juan ... and landscape features to create complex structures with astronomical alignments to improve their relationship ... 29 ref Ancient astronomical complexes Examples of suggested ancient astronomical complexes that may ... top cairns on Bodmin Moor in Cornwall , suggested to compose a ritual or astronomical complex .... ref ref http books.google.co.uk books?id Tt0Va7OotD4C&pg PA191&dq astronomical complex&hl en&ei 02F6TZfOBZCZhQf56fT0Bg&sa X&oi book result&ct result&resnum 7&ved 0CEUQ6AEwBjgU v onepage&q astronomical ... astronomical complex in the world . ref http books.google.co.uk books?id NJI5KiH6MLsC&pg PA277&dq astronomical ... v onepage&q astronomical 20complex&f false Bauval, Robert., The Egypt Code, Page 277, Century ... Astronomico . ref http books.google.co.uk books?id fh402zxnOQcC&pg PA87&dq astronomical complex&hl ... astronomical 20complex&f false Rice, Prudence M., Maya political science time, astronomy, and the cosmos ... in England , also known as the Wandlebury Enigma or The Wandlebury Hatfield Heath Astronomical ... 03 03 ref Modern astronomical complexes Examples of modern astronomical complexes of star stellar observatories include The Leoncito Astronomical Complex in the San Juan Province Argentina San Juan Province of Argentina . The University of Idaho Astronomical Complex in the United States of America . ref http books.google.co.uk books?id M6ZuNwAACAAJ&dq astronomical complex&hl en&ei vSF6TcCrA4KyhAeZ46DmBg ... Astronomical Complex, Moscow, Idaho, 214 pages, University of Idaho, 1984 ref The research and observational ... books.google.co.uk books?id IY1 AAAAIAAJ&q astronomical complex&dq astronomical complex&hl en&ei yCR6TcT6MYWyhAfKt XtBg&sa X&oi book result&ct result&resnum 4&ved 0CDcQ6AEwAzgK Grothkopf, Uta., Astronomical Society of the Pacific conference serie, Volume 153, p. 3, Astronomical Society of the Pacific ...   more details



  1. Astronomical chronology

    Astronomical chronology , or astronomical dating , is a technical method of dating events or artifacts that are associated with astronomical phenomena. Written records of historical events that include descriptions of astronomical phenomena have done much to clarify the chronology of the Ancient Near ... astronomical calculations. quote box align right quote Astronomical dating can be a powerful tool ... Absolute Chronologies. Dating historical events The use of descriptions of astronomical phenomena ... in history and of increasingly precise astronomical tables. ref Anthony Grafton, Some Uses of Eclipses ... of unique astronomical events like eclipses, since eclipses are relatively infrequent events, they can ... abs 2006JHA....37...55S Astronomical Dating of Babylonian Texts Describing the Total Solar Eclipse of S.E. 175 , Journal for the History of Astronomy , 37 2006 55 69. ref Astronomical ... the record refer to an actual astronomical event, or is this merely a modern assumption? If it does refer to an actual astronomical event, is the source reliable? Can the record provide an unambiguous date without making unwarranted assumptions about ancient astronomical observational methods? ref ... astronomy astronomical diaries provide detailed and unambiguous accounts of the positions of all ... , http www.pothos.org content index.php?page astronomical diaries Astronomical Diaries ref Since ... of astronomical phenomena, attempts to date literary texts astronomically, which may describe astronomical events loosely or even as metaphors, have led researchers to conclusions that appear ... need not be taken as reflecting precise astronomical observations while precession is a very slow process ... Among the artifacts that can most readily be dated by astronomical techniques are depictions of the positions ... an hour. ref William D. Stahlman, Astronomical Dating Applied to a Type of Astrological Illustration ... source of error in the date was the uncertainty of 16th century astronomical calculations. The resulting ...   more details



  1. Astronomical art

    Astronomical art is the aspect of Space art devoted to visualizing the wonders of outer space . A major emphasis of such art is the space environment as a new frontier for Humanity. Many other works portray ... from astronomy . Astronomical art was largely pioneered in the 1940s and 50s by the abilities ... on how to leave Earth and in showing wonders awaiting us out there. Astronomical Art is the most recent ... history and prehistoric animal art and finally the steadily revealed universe. Most Astronomical ... reflect ongoing knowledge and educated guesswork. An example of the process of creating astronomical ... a picture. The best astronomical art shares with the viewer what it is that catches the artists imagination ... and particularly astronomical artists in the 1950s.The several picture essay magazines of the time such as Life , Colliers , and Coronet were other major outlets for such art. Today astronomical art ... it, much of which appeared in contemporary Life magazines. Another close parallel to Astronomical art ... we can never behold with our own eyes. Ideally, as with Astronomical art, such a work tries to show .... Most of today s widely published space and astronomical artists have belonged since 1983 to the http www.iaaa.org International Association of Astronomical Artists br Image Giotto Scrovegni 18 ..., to interest the Vatican in establishing an astronomical observatory. valign top 1858 Comet Donati ... of his pastels of astronomical subjects. valign top 1877 Paul Dominique Philippoteaux and engraver ... in Life magazine Life magazine , introducing astronomical art to a wide American audience. Books .... Sagan used such art in several of his books. Astronomical art related books Space Art Ron Miller ... of Astronomical Artists http www.bonestell.org Ron Millers definitive web site on Chesley Bonestell http www.astroart.org David A. Hardy s AstroArt site http www.novacelestia.com Astronomical Illustrations ... A. Garlick s Space and Astronomical Art http www.spaceprime.com Brian Smallwood Space Art http alizeykhan.com ...   more details



  1. Astronomical rings

    Astronomical rings Latin language Latin annuli astronomici ref cite web title Annulus Astronomicus url http www.mhs.ox.ac.uk students 98to99 Inst Instpgs 2a.Gemmasrings.html accessdate 2009 07 18 ref , also known as Gemma s rings, are an early astronomical instrument. The instrument consists of three rings, the meridien, the equator, and the declination ring. It may be considered to be a simplified, portable armillary sphere , or a more complex form of astrolabe . The Rings The meridian astronomy meridian ring, when in use, occupies a plane with one axis running north and south, and the other vertical. A sliding suspension shackle is attached to the top of this ring, from which the whole device can be suspended. When properly used, this points to the latitude at which the instrument is being used. This ring can function as the gnomon , when the rings are used as a sundial . The equatorial ring occupies a plane parallel to the celestial equator, at right angles to the meridian. Often equipped with a graduated scale, it can be used to measure right ascension . The declination ring is moveable, and rotates on pivots set in the meridian ring. An imaginary line connecting these pivots is parallel to the Earth s axis. This ring is often equipped with vanes and pinholes for use as the alidade of a dioptra . It can be used to measure declination . History The parts of the instrument go back to instruments made and used by Greek astronomy ancient Greek astronomers . Gemma Frisius combined several of the instruments into a small, portable instrument, first published in 1534 ref cite journal last Sorgeloos first Claude authorlink year 2001 title Un post incunable retrouv L Usus annuli ... of astronomical rings by Gemma Frisius journal Quaerendo volume 31 issue 4 pages 255 264 publisher ... trans title The Use of the Astronomical Rings url http books.google.com ?id js05AAAAcAAJ&dq 22annuli ... Historical scientific instruments Category Astronomical instruments Category Sundials ...   more details



  1. Astronomical constant

    An astronomical constant is a physical constant used in astronomy . A formal set of constants, along with recommended values, was defined by the International Astronomical Union IAU in 1976, ref name IAU76 ... of the International Astronomical Union , Grenoble, 1976. ref and a new set of recommended values ... of constants is widely reproduced in publications such as the Astronomical Almanac of the United ... a system of astronomical units for length, mass and time in fact, several such systems , and also ... between astronomical units and SI unit s. Slightly different values for the constants are obtained ... , math math GS rm SI 1 L rm B GS rm TDB , math Astronomical system of units main Astronomical system of units The astronomical unit of time is a time interval of one day D of 86400 seconds. The astronomical unit of mass is the mass of the Sun S . The astronomical unit of length is that length A for which ... 95 when the units of measurement are the astronomical units of length, mass and time. ref name IAU76 Table of astronomical constants class wikitable Quantity Symbol Value Relative br uncertainty ... static resolutions IAU2000 French.pdf XXIVth General Assembly of the International Astronomical Union ... of the International Astronomical Union , Prague, 2006. ref colspan 5 Primary constants Mean ratio of the Barycentric ... name IAU00 Light time for Astronomical unit unit distance align center sub A sub 499.004&thinsp 786 ... XXVIth General Assembly of the International Astronomical Union , Prague, 2006. ref Obliquity ... of the International Astronomical Union , Manchester, 2000. ref Astronomical unit Unit distance ... e &minus 11 ref name IAUgen citation title The IAU and astronomical units url http www.iau.org public press themes measuring publisher International Astronomical Union ref Light year 365.25 cD align center .... arxiv 0801.3807 title Solar Mass Loss, the Astronomical Unit, and the Scale of the Solar System journal ... cited in the table. References http asa.usno.navy.mil SecK 2009 Astronomical Constants 2009.pdf ...   more details



  1. Astronomical survey

    13 May 2011 work Fox News date 12 May 2011 ref Infrared IRAS Infrared Astronomical Satellite did an all ... a Spitzer Space Telescope legacy observation program of the LMC Further information See astronomical catalogue for a more detailed description of astronomical surveys and the production of astronomical catalogues Redshift survey s are astronomical surveys devoted to mapping the cosmos in three dimensions Category astronomical catalogues List of astronomical catalogues on wikipedia Astrograph for a type of instrument used in Astronomical surveys. Timeline of astronomical maps, catalogs, and surveys Notes references Category Astronomical surveys Category Astronomical imaging Category Observational ...   more details



  1. Astronomical unit

    About unit of length the full system of units Astronomical system of units Unit of length m 149597870700 An astronomical unit abbreviated as AU , au , a.u. , or ua is a unit of measurement unit of length ... ISO 80000 , while au is recommended by the International Astronomical Union , ref citation title The IAU Style Manual 1989 The Preparation of Astronomical Papers and Reports url http www.iau.org static ... however, the use of AU to refer to the astronomical unit is widespread. ref See, for example, the Merriam ... Dictionary . ref The astronomical constant whose value is one astronomical unit is referred to as unit ... Astronomical Union revised the definition of the AU for greater precision, defining it as that length ... 95 when the units of measurement are the astronomical units of length, mass and time. ref name IAU76 ... of the International Astronomical Union , Grenoble, 1976 ref ref name Tr mper Citation title Astronomy ...&pg RA1 PA4 page 4 year 2009 author H. Hussmann, F. Sohl, J. Oberst chapter 4.2.2.1.3 Astronomical ... Whitmore Fairbridge chapter Astronomical unit url http books.google.com books?id dw2GadaPkYcC&pg PA48 ... calculated in astronomical units. The comparison gives the speed of light in astronomical ... asa.usno.navy.mil SecK 2009 Astronomical Constants 2009.pdf 2009 Selected Astronomical Constants in citation title The Astronomical Almanac Online url http asa.usno.navy.mil publisher United States ... of light in AU d c sub AU sub also determines the value of the astronomical unit in meters A math A 86 ,400 frac c rm SI c rm AU . math The best current 2009 estimate of the International Astronomical Union IAU for the value of the astronomical unit in meters is A   nowrap 149 597 870 700 3   ... of the three largest asteroids, the Moon Earth mass ratio and the Astronomical Unit url http ..., the astronomical unit is dependent on the heliocentric gravitational constant , that is the product ... why ephemerides are calculated in astronomical units and not in SI units. The calculation of ephemerides ...   more details



  1. Astronomical interferometer

    Image Interf diagram.gif thumb right Diagram showing a possible layout for an astronomical interferometer ... mirror . An astronomical interferometer is an array of telescopes or mirror segments acting together to probe structures with higher resolution by means of interferometry . Astronomical interferometers ... astronomy . Aperture synthesis can be used to perform high resolution imaging using astronomical ... wavelengths, aperture synthesis allows the astronomical seeing atmospheric seeing resolution limit ... limit of the array. Astronomical interferometers can produce higher Angular resolution resolution astronomical images than any other type of telescope. At radio wavelengths image resolutions of a few ... can be achieved at visible and infrared wavelengths. One simple layout of an astronomical interferometer ... as the optical path lengths from the astronomical object to the beam combiner or focus are the same ... of astronomical interferometers Image Hooker interferometer.jpg left thumb 280px A 20 foot Michelson .... For the next three decades astronomical interferometry research was dominated by research at radio ... interferometer, which operates fast enough to follow the blurring effects of astronomical seeing ... at other astronomical telescope arrays, including the Keck Interferometer and the Palomar Testbed ... journal title The application of interferometry to optical astronomical imaging, author Baldwin, John ... to convert the measured visibility amplitudes and closure phase s into astronomical images. The same techniques have now been applied at a number of other astronomical telescope arrays, including ... high fidelity images from a long baseline interferometer. Modern astronomical interferometry Astronomical interferometry is principly conducted using Michelson and sometimes other type interferometers ... right The VLTI infrared astronomical interferometer. Projects are now beginning that will use interferometers ... from the different telescopes to the astronomical instruments where it is combined and processed. This feature ...   more details



  1. Sextant (astronomical)

    of angular distances between astronomical bodies. These instruments differ substantially from ..., the astronomical sextants are large and measure angles directly a 60 arc will measure at most ... a sextant at the Royal Greenwich Observatory References references Category Astronomical instruments ...   more details



  1. Astronomical seeing

    of the wavefronts plotted is highly exaggerated. Astronomical seeing refers to the blurring and scintillation astrophysics twinkling of astronomical objects such as stars caused by turbulence turbulent mixing in the Earth s atmosphere varying the optical refractive index . The astronomical seeing ... like star through the atmosphere. The size of the seeing disc is determined by the astronomical ... of a lake they do not result from turbulent mixing. The effects of astronomical seeing div style ... a 7r sub 0 sub telescope . gallery div Astronomical seeing has several effects It causes the images ... scintillation or twinkling Atmospheric seeing causes the fringes in an astronomical interferometer ... is substantially lower. Measures of astronomical seeing There are three common descriptions of the astronomical .... In a typical astronomical image of a star with an exposure time of seconds or even minutes, the different ... of the astronomical seeing conditions. It follows from this definition that seeing is always ... one for average astronomical sites. The seeing of an urban environment is usually much worse. Good ... providing seeing as good as 0.4 . r sub 0 sub and t sub 0 sub The astronomical seeing conditions ... of the atmosphere. r sub 0 sub and t sub 0 sub vary with the wavelength used for the astronomical imaging ... of astronomical seeing on images taken through ground based telescopes. Three simulated ... images to highlight the fainter features more clearly a common astronomical convention . The telescope ... is a commonly used measurement of the astronomical seeing at observatories. At visible wavelengths ... Monthly Notices of the Royal Astronomical Society volume 251 month July pages 155 166 cite journal last ... interferometer journal Publications of the Astronomical Society of the Pacific volume 100 month ... 10.1364 AO.26.004106 pmid 20490196 issue 19 ref and is widely used in simulations of astronomical imaging ... conditions at astronomical observatories. math r 0 math can be determined from a measured ...   more details



  1. Astronomical transit

    include 1 Dec Timeline of the far future Astronomical events 40396 Terrestrial Time TT Uranus transits ... of astronomical bodies. The contacts happen in the following order First contact the smaller ..., see also occultation . External links commonscat Astronomical transit External references http www.sil.si.edu ... 0 943396 25 5 Jean Meeus Astronomical Tables of the Sun, Moon and Planets. Richmond, Virginia Willmann ... Use dmy dates date August 2010 DEFAULTSORT Astronomical Transit Category Astrometry Category Astronomical transits Category Astronomical events Category Technical factors of astrology Category Astrological ...   more details



  1. Astronomical spectroscopy

    Refimprove date July 2010 Expert subject date August 2010 Astronomical spectroscopy is the technique of spectroscopy used in astronomy . The object of study is the electromagnetic spectrum spectrum of electromagnetic radiation , including visible light, which radiant energy radiates from star s and other celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, but also their motion by Doppler shift measurements. Stars Astronomical spectroscopy began with Isaac Newton s initial observations of the light of the Sun , dispersed by a triangular prism optics prism . He saw a rainbow of colour, and may even have seen absorption line s. Citation needed date August 2010 These dark bands which appear throughout the solar spectrum were first described in detail by Joseph von Fraunhofer . Most stellar spectra share these two dominant features of the Sun s spectrum emission at all wavelengths across the optical spectrum the continuum with many discrete absorption line s, resulting from gaps of radiation. Fraunhofer s original 1817 designations of absorption lines in the solar spectrum sz pt bl zat Letter alphabet Letter ... D. year 1999 title Interpreting Astronomical Spectra publisher John Wiley and Sons page 6 isbn ... of astronomical objects. A simple, homemade DVD spectrograph can be used to view solar spectra. ref ... in amateur astronomical spectroscopy. ref name resurgence M. V. Gavin, http www.skyandtelescope.com ... It is possible to use a digital camera or telescope to easily view spectra of astronomical objects ... is Astronomical Spectroscopy for Amateurs , published in 2011. ref name Harrison K. M. Harrison, Astronomical ... gallery.html The Star Analyser 100 User Gallery DEFAULTSORT Astronomical Spectroscopy Category Spectroscopy Category Astronomical spectroscopy Category Observational astronomy Link FA hu ca ... astronomiczna pt Espectroscopia astron mica simple Astronomical spectroscopy tr G kbilimsel ...   more details




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