1.
Franeker
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Franeker is one of the eleven historical cities of Friesland and capital of the municipality of Franekeradeel. It is located about 20 km west of Leeuwarden on the Van Harinxma Canal, as of 1 January 2006, it had 12,996 inhabitants. The Eisinga Planetarium from around the year 1800 is located in the city, Franeker was founded around 800 as a Carolingian stronghold. The name probably derives from Froon-acker, meaning country of the king, beginning around the 11th century, Franeker developed into the administrative center Westergoa. Franeker received city rights in 1374, in the 15th century, Albert, Duke of Saxony established himself in Franeker. The city appeared for a time to be growing into the city of Friesland. During the period of the Dutch Revolt, the town sided early on with William I, from 1585 to 1811, the city housed the University of Franeker, which was the second Protestant university in the Netherlands. It was closed shortly after the incorporation of the Kingdom of Holland into the French Empire, a successor institution, the Rijksatheneum, was founded in 1815, but in 1847 it, too, closed. The Krystkongres, usually held in Franeker, is the convention for Frisian students living in Dutch student towns. Franeker is located at 53°12′N 5°32′E in the municipality of Franekeradeel in the west of the province of Friesland in the north of the Netherlands and it is east of the city of Harlingen and about 20 km west of the provincial capital Leeuwarden. It is situated on the Van Harinxma Canal, as of 1 January 2006, the city of Franeker had a population of 12,996. The Eisinga Planetarium and the Museum Martena are museums located in the city, the Planetarium is an orrery built by a local wool carder to explain a conjunction of the planets and to help mitigate local fears of what would happen during the planets alignment. Built in Eisingas own living room, it is one of the oldest operating orreries in the world, the Museum Martena, opened in 2006, is housed in a manor house built in 1498 and is devoted to the history of the city and the region. The windmill Arkens is a hollow post mill which has been restored and it originally stood in Arkens and was moved in 1972. It is the windmill in the Netherlands equipped with Vlinderwieken. Since 1852 Franeker is the home of the PC. the most important tournament in Frisian handball, Franeker is a regular host of the Frisian draughts competitions. Being one of the Frisian cities, Franeker is also on the route of the 200 kilometres Elfstedentocht, in August 2014, Jeffrey Peereboom, a student from Franeker, introduced an idea of the speed limits for bicycles in order to make biking in the city safer. Franeker railway station is a station on the NS line between Leeuwarden and Harlingen and it also had a station on the North Friesland Railway which was the terminus of a branch from Tzummarum
2.
Netherlands
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The Netherlands, also informally known as Holland is the main constituent country of the Kingdom of the Netherlands. It is a densely populated country located in Western Europe with three territories in the Caribbean. The European part of the Netherlands borders Germany to the east, Belgium to the south, and the North Sea to the northwest, sharing borders with Belgium, the United Kingdom. The three largest cities in the Netherlands are Amsterdam, Rotterdam and The Hague, Amsterdam is the countrys capital, while The Hague holds the Dutch seat of parliament and government. The port of Rotterdam is the worlds largest port outside East-Asia, the name Holland is used informally to refer to the whole of the country of the Netherlands. Netherlands literally means lower countries, influenced by its low land and flat geography, most of the areas below sea level are artificial. Since the late 16th century, large areas have been reclaimed from the sea and lakes, with a population density of 412 people per km2 –507 if water is excluded – the Netherlands is classified as a very densely populated country. Only Bangladesh, South Korea, and Taiwan have both a population and higher population density. Nevertheless, the Netherlands is the worlds second-largest exporter of food and agricultural products and this is partly due to the fertility of the soil and the mild climate. In 2001, it became the worlds first country to legalise same-sex marriage, the Netherlands is a founding member of the EU, Eurozone, G-10, NATO, OECD and WTO, as well as being a part of the Schengen Area and the trilateral Benelux Union. The first four are situated in The Hague, as is the EUs criminal intelligence agency Europol and this has led to the city being dubbed the worlds legal capital. The country also ranks second highest in the worlds 2016 Press Freedom Index, the Netherlands has a market-based mixed economy, ranking 17th of 177 countries according to the Index of Economic Freedom. It had the thirteenth-highest per capita income in the world in 2013 according to the International Monetary Fund, in 2013, the United Nations World Happiness Report ranked the Netherlands as the seventh-happiest country in the world, reflecting its high quality of life. The Netherlands also ranks joint second highest in the Inequality-adjusted Human Development Index, the region called Low Countries and the country of the Netherlands have the same toponymy. Place names with Neder, Nieder, Nether and Nedre and Bas or Inferior are in use in all over Europe. They are sometimes used in a relation to a higher ground that consecutively is indicated as Upper, Boven, Oben. In the case of the Low Countries / the Netherlands the geographical location of the region has been more or less downstream. The geographical location of the region, however, changed over time tremendously
3.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation
4.
Science museum
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A science museum is a museum devoted primarily to science. Older science museums tended to concentrate on static displays of objects related to history, paleontology, geology, industry and industrial machinery. Modern trends in museology have broadened the range of subject matter, many if not most modern science museums — which increasingly refer to themselves as science centers or discovery centers — also emphasize technology, and are therefore also technology museums. The mission statements of science centers and modern museums vary, but they are united in being places that make science accessible and they are an integral and dynamic part of the learning environment, promoting exploration from the first Eureka. As early as the Renaissance, many aristocrats collected curiosities for display to their family, universities and particularly medical schools also maintained study collections of specimens for their students. Scientists and collectors displayed their finds in private cabinets of curiosities, such collections were the predecessors of modern natural history museums. The first purpose-built museum covering natural philosophy and open to the public from 1683 was the original Ashmolean museum in Oxford, the first dedicated science museum was the Museo de Ciencias Naturales, in Madrid, Spain. Opened in 1752, it almost disappeared during the Franco regime, the Utrecht University Museum, among others, still displays an extensive collection of 18th-century animal and human rarities in its original setting. Another line in the genealogy of science museums came during the Industrial Revolution, for example, the Great Exhibition in The Crystal Palace eventually gave rise to Londons Science Museum. In America, various Natural History Societies established collections in the early 19th century, notable was the early New England Museum of Natural History, which opened in Boston in 1864. The Academy of Science of Saint Louis was founded in 1856 as the first scientific organization west of the Mississippi, the modern interactive science museum appears to have been pioneered by Munich’s Deutsches Museum in the early 20th century. This museum had moving exhibits where visitors were encouraged to push buttons, the concept was taken to the US by Julius Rosenwald, chairman of Sears, Roebuck and Company, who visited the Deutsches Museum with his young son in 1911. He was so-captivated by the experience that he decided to build a museum in his home town. Chicagos Museum of Science and Industry opened in phases between 1933 and 1940, in 1959 the Museum of Science and Natural History was formally created by the Academy of Science of Saint Louis, featuring many interactive science and history exhibits. In August 1969, Frank Oppenheimer dedicated his new Exploratorium in San Francisco almost completely to interactive science exhibits, the Exploratorium published the details of their own exhibits in Cookbooks that served as an inspiration to many other museums around the world. Opened in September 1969, the Ontario Science Centre continued the trend of featuring interactive exhibits rather than static displays, in 1973, the first Omnimax theater opened as the Reuben H. Fleet Space Theater and Science Center in San Diegos Balboa Park, the tilted-dome Space Theater doubled as a planetarium. The Science Center was an Exploratorium-style museum included as a part of the complex
5.
Dutch language
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It is the third most widely spoken Germanic language, after English and German. Dutch is one of the closest relatives of both German and English and is said to be roughly in between them, Dutch vocabulary is mostly Germanic and incorporates more Romance loans than German but far fewer than English. In both Belgium and the Netherlands, the official name for Dutch is Nederlands, and its dialects have their own names, e. g. Hollands, West-Vlaams. The use of the word Vlaams to describe Standard Dutch for the variations prevalent in Flanders and used there, however, is common in the Netherlands, the Dutch language has been known under a variety of names. It derived from the Old Germanic word theudisk, one of the first names used for the non-Romance languages of Western Europe. It literarily means the language of the people, that is. The term was used as opposed to Latin, the language of writing. In the first text in which it is found, dating from 784, later, theudisca appeared also in the Oaths of Strasbourg to refer to the Germanic portion of the oath. This led inevitably to confusion since similar terms referred to different languages, owing to Dutch commercial and colonial rivalry in the 16th and 17th centuries, the English term came to refer exclusively to the Dutch. A notable exception is Pennsylvania Dutch, which is a West Central German variety called Deitsch by its speakers, Jersey Dutch, on the other hand, as spoken until the 1950s in New Jersey, is a Dutch-based creole. In Dutch itself, Diets went out of common use - although Platdiets is still used for the transitional Limburgish-Ripuarian Low Dietsch dialects in northeast Belgium, Nederlands, the official Dutch word for Dutch, did not become firmly established until the 19th century. This designation had been in use as far back as the end of the 15th century, one of them was it reflected a distinction with Hoogduits, High Dutch, meaning the language spoken in Germany. The Hoog was later dropped, and thus, Duits narrowed down in meaning to refer to the German language. g, in English, too, Netherlandic is regarded as a more accurate term for the Dutch language, but is hardly ever used. Old Dutch branched off more or less around the same time Old English, Old High German, Old Frisian and Old Saxon did. During that period, it forced Old Frisian back from the western coast to the north of the Low Countries, on the other hand, Dutch has been replaced in adjacent lands in nowadays France and Germany. The division in Old, Middle and Modern Dutch is mostly conventional, one of the few moments linguists can detect somewhat of a revolution is when the Dutch standard language emerged and quickly established itself. This is assumed to have taken place in approximately the mid-first millennium BCE in the pre-Roman Northern European Iron Age, the Germanic languages are traditionally divided into three groups, East, West, and North Germanic. They remained mutually intelligible throughout the Migration Period, Dutch is part of the West Germanic group, which also includes English, Scots, Frisian, Low German and High German
6.
Orrery
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An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the sizes of these bodies, but since accurate scaling is often not practical due to the actual large ratio differences. They are typically driven by a mechanism with a globe representing the Sun at the centre. The Antikythera mechanism, discovered in 1900 in a wreck off the Greek island of Antikythera and extensively studied, exhibited the diurnal motions of the Sun, Moon, and it has been dated between 150 and 100 BC. The Antikythera hand driven mechanism is now considered one of the first orreries and it was geocentric and used as a mechanical calculator designed to calculate astronomical positions. According to Cicero, the Roman philosopher who was writing in the first century BC, the clock itself is lost, but Dondi left a complete description of the astronomic gear trains of his clock. As late as 1650, P. Schirleus built a geocentric planetarium with the Sun as a planet, the clocks are now on display in Kassel at the Astronomisch-Physikalisches Kabinett and in Dresden at the Mathematisch-Physikalischer Salon. In De revolutionibus orbium coelestium, published in Nuremberg in 1543 and he observed that some Greek philosophers had proposed a heliocentric universe. This simplified the apparent epicyclic motions of the planets, making it feasible to represent the paths as simple circles. This could be modelled by the use of gears, tycho Brahes improved instruments made precise observations of the skies, and from these Johannes Kepler deduced that planets orbited the Sun in ellipses. In 1687 Isaac Newton explained the cause of motion in his theory of gravitation. Orreries take three forms, Solid Models typically the size of a coffee table, real World Orreries typically the length of a walk. Virtual World Orreries where the imagination is unlimited. Clock makers George Graham and Thomas Tompion built the first modern orrery around 1704 in England, Graham gave the first model, or its design, to the celebrated instrument maker John Rowley of London to make a copy for Prince Eugene of Savoy. Rowley was commissioned to make another copy for his patron Charles Boyle, 4th Earl of Orrery and this model was presented to Charles son John, later the 5th Earl of Cork and 5th Earl of Orrery. Independently, Christiaan Huygens published details of a heliocentric planetary machine in 1703 and he calculated the gear trains needed to represent a year of 365.242 days, and used that to produce the cycles of the principal planets. The Sun in a brass orrery provides the light in the room. The orrery depicted in the painting has rings, which give it a similar to that of an armillary sphere
7.
Friesland
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Friesland or Frisia is a province in the northwest of the Netherlands. It is situated west of Groningen, northwest of Drenthe and Overijssel, north of Flevoland, northeast of North Holland, in 2010, the province had a population of 646,000 and a total area of 5,749 km2. The capital and seat of the government is the city of Leeuwarden. Since 2017, Arno Brok is the Kings Commissioner in the province, a coalition of the Labour Party, the Christian Democratic Appeal, and the Frisian National Party forms the executive branch. The province is divided into 24 municipalities, the area of the province was once part of the ancient, larger region of Frisia. The official languages of Friesland are West Lauwers Frisian and Dutch, a proto-Frisian culture slowly began to emerge around 400–200 BC known for its artificial dwelling hills as a defence against the sea. The Roman claim on Frisia began in 12 BC with the campaign of Nero Claudius Drusus in Germania, after a series of costly battles against the Frisians, the Romans were suddenly sworn fealty. The de facto independence they later enjoyed as a Roman vassal shows that this might have been a mostly diplomatic decision based on the temporary favourable bargaining position. Together with other Germanic tribes such as the Salians and the Batavii they managed to keep the north of the Lower Rhine mostly free from Roman influence. The early eighth-century AD is known for the Frisian Kingdom, king Redbad, after incorporation into the Frankish empire, Friesland was divided into three parts. The westernmost part developed at the start of the second millennium into the County of Holland, while the remainder of Frisia had no feudal overlord and that ended when Charles V added Frisia to the Habsburg Netherlands as Lordship of Frisia. Under Napoleon, the department was named Frise, after Napoleon was defeated in 1813, the department became part of the United Kingdom of the Netherlands as the province of Friesland. Friesland is the largest province of the Netherlands if one includes areas of water, in terms of land area only, the provinces highest point is at 45 metres above sea level, on the island of Vlieland. There are four parks, Schiermonnikoog, De Alde Feanen, Lauwersmeer. The ten urban areas in Friesland with the largest population are, The province is divided into 24 municipalities, the province of Friesland has an oceanic climate. In 2010, Friesland had a population of 646,305, the years 1880–1900 show slower population growth due to a farm crisis in which 20,000 Frisians emigrated to the United States of America. Since the late Middle Ages, Friesland has been renowned for the height of its inhabitants. Friesland is mainly an agricultural province, the black and white Frisian cattle, black and white Stabyhoun and the black Frisian horse originated here
8.
Museum
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Most large museums are located in major cities throughout the world and more local ones exist in smaller cities, towns and even the countryside. Museums have varying aims, ranging from serving researchers and specialists to serving the general public, the goal of serving researchers is increasingly shifting to serving the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, the city with the largest number of museums is Mexico City with over 128 museums. According to The World Museum Community, there are more than 55,000 museums in 202 countries, the English museum comes from the Latin word, and is pluralized as museums. The first museum/library is considered to be the one of Plato in Athens, however, Pausanias gives another place called Museum, namely a small hill in Classical Athens opposite to the Akropolis. The hill was called Mouseion after Mousaious, a man who used to sing on the hill, the purpose of modern museums is to collect, preserve, interpret, and display items of artistic, cultural, or scientific significance for the education of the public. The purpose can also depend on ones point of view, to a family looking for entertainment on a Sunday afternoon, a trip to a local history museum or large city art museum could be a fun, and enlightening way to spend the day. To city leaders, a healthy museum community can be seen as a gauge of the health of a city. To a museum professional, a museum might be seen as a way to educate the public about the museums mission, Museums are, above all, storehouses of knowledge. In 1829, James Smithsons bequest, that would fund the Smithsonian Institution, stated he wanted to establish an institution for the increase, Museums of natural history in the late 19th century exemplified the Victorian desire for consumption and for order. Gathering all examples of classification of a field of knowledge for research. As American colleges grew in the 19th century, they developed their own natural history collections for the use of their students, while many large museums, such as the Smithsonian Institution, are still respected as research centers, research is no longer a main purpose of most museums. While there is a debate about the purposes of interpretation of a museums collection, there has been a consistent mission to protect. Much care, expertise, and expense is invested in efforts to retard decomposition in aging documents, artifacts, artworks. All museums display objects that are important to a culture, as historian Steven Conn writes, To see the thing itself, with ones own eyes and in a public place, surrounded by other people having some version of the same experience can be enchanting. Museum purposes vary from institution to institution, some favor education over conservation, or vice versa. For example, in the 1970s, the Canada Science and Technology Museum favored education over preservation of their objects and they displayed objects as well as their functions. One exhibit featured a printing press that a staff member used for visitors to create museum memorabilia
9.
Top 100 Dutch heritage sites
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The Top 100 Dutch heritage sites is a list of rijksmonuments in the Netherlands, established in 1990 by the Department for Conservation. The Top 100 was a selection of historical monuments that were authorized to display the symbol of the Hague Convention of 1954, the list should not be confused with the UNESCO World Heritage list. The buildings on the list could expect extra security in the context of the policy, the Top 100 list is no longer official, as the extra cultural protection policy is no longer applied. The following Top 100 also includes a list of the most important stained glass, church bells and organs
10.
Eise Eisinga
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Eise Jeltes Eisinga was a Frisian amateur astronomer who built the Eise Eisinga Planetarium in his house in Franeker, Frisia Province in the Netherlands. The orrery still exists and is the oldest functioning planetarium in the world, Eise Jeltes Eisinga was born on 21 February 1744 in Dronrijp in the Dutch Republic. He was the son of Jelte Eises from Oosterlittens, a wool carder, although Eisinga was moderately gifted, he was not allowed to go to school. When he was only 17 years old he published a book about the principles of astronomy, Eisinga became a wool carder in Franeker, Netherlands. Through self-education he mastered mathematics and astronomy, which he studied at the Franeker Academy. At the age of 24 he married Pietje Jacobs and they had three children, one girl and two boys, Trijntje Jelte Jacobus Due to a political crisis in 1787, he had to leave Friesland and went to Germany. Later he moved to Visvliet where he worked as a wool comber and he was banned from Friesland for five years and therefore stayed in Visvliet just across the border in Groningen. Meanwhile his wife died, and on 27 May 1792 he married Trijntje Eelkes Sikkema in Visvliet and they had one son and two daughters. Eelke Hittje Minke In 1795 he returned to Franeker, Eisinga became a professor at the Franeker Academy, until 1811 when Napoleon ordered it to be closed. Eisinga died on 27 August 1828, at the age 84, on 8 May 1774 a conjunction of the moon and the planets Mercury, Venus, Mars, Jupiter was forecast to appear. Reverend Eelco Alta, from Boazum, Netherlands, published a book in which he interpreted this as a return to the state of the planets at the day of creation and a likely occasion for Armageddon. Alta predicted that the planets and the moon would collide, with the result that the earth would be pushed out of its orbit, Due to this prediction there was a lot of panic in Friesland. The canonical view holds that Eisinga decided to build an orrery in his room to prove that there was no reason for panic. He expected to finish it within six months and eventually finished it in 1781, during the same year Uranus was discovered, but there was no room for this planet on the ceiling of his living room, where the orrery was located. However, recent research indicates that this chain of causality is dubious, the construction of the orrery saved Eijsinga a lot of time, however, because he no longer needed to calculate the planets respective positions by hand. On 30 June 1818 King William I of the Netherlands and Prince Frederik visited the orrery, King William I bought the orrery for the Dutch state. In 1859 the orrery was donated by the Dutch state to the city of Franeker, Eisinga was rewarded by becoming an honorary citizen of Franeker. The street of his planetarium was renamed Eise Eisingastraat, on 5 May 1994 an 80 cent stamp was issued by the post office to celebrate his 250th birthday
11.
Rijksmonument
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A rijksmonument is a national heritage site of the Netherlands, listed by the agency Rijksdienst voor het Cultureel Erfgoed acting for the Dutch Ministry of Education, Culture and Science. To be designated, a place must be over 50 years old, there are around 51,000 designated rijksmonuments in the Netherlands. The program was started during the Hague Convention in 1954, the current legislation governing the monuments is the Monumentenwet van 1988. The organization responsible for caring for the monuments, which used to be called Monumentenzorg, was recently renamed, and is now called Rijksdienst voor het Cultureel Erfgoed. In June 2009, the Court of The Hague decided that individual purchasers of buildings that were listed as rijksmonuments would be exempt from paying transfer tax, previously this exemption had only applied to legal entities. Many Dutch tourist attractions are rijksmonuments, such as castles or windmills, among the rijksmonuments are also many churches. A provincial monument is a monument designated by a province, in the Netherlands there are only two provinces that assign monuments, North Holland and Drenthe. The designation allows the provinces to protect the monuments and are a base for the regulation of subsidy for restoring the monuments, a municipal monument is a monuments designated by a municipality. A municipal monument is not of importance but it is important for the region or city/village. List of Rijksmonuments List of heritage registers Monumentenregister, official database of heritage sites Monumenten. nl
12.
UNESCO
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The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations based in Paris. It is the heir of the League of Nations International Committee on Intellectual Cooperation, UNESCO has 195 member states and nine associate members. Most of its offices are cluster offices covering three or more countries, national and regional offices also exist. UNESCO pursues its objectives through five major programs, education, natural sciences, social/human sciences, culture and it is also a member of the United Nations Development Group. UNESCO and its mandate for international cooperation can be traced back to a League of Nations resolution on 21 September 1921, on 18 December 1925, the International Bureau of Education began work as a non-governmental organization in the service of international educational development. However, the work of predecessor organizations was largely interrupted by the onset of World War II. On 30 October 1943, the necessity for an organization was expressed in the Moscow Declaration, agreed upon by China, the United Kingdom, the United States. This was followed by the Dumbarton Oaks Conference proposals of 9 October 1944, a prominent figure in the initiative for UNESCO was Rab Butler, the Minister of Education for the United Kingdom. At the ECO/CONF, the Constitution of UNESCO was introduced and signed by 37 countries, the Preparatory Commission operated between 16 November 1945, and 4 November 1946—the date when UNESCOs Constitution came into force with the deposit of the twentieth ratification by a member state. The first General Conference took place between 19 November to 10 December 1946, and elected Dr. Julian Huxley to Director-General and this change in governance distinguished UNESCO from its predecessor, the CICI, in how member states would work together in the organizations fields of competence. In 1956, the Republic of South Africa withdrew from UNESCO claiming that some of the organizations publications amounted to interference in the racial problems. South Africa rejoined the organization in 1994 under the leadership of Nelson Mandela, UNESCOs early work in the field of education included the pilot project on fundamental education in the Marbial Valley, Haiti, started in 1947. This project was followed by missions to other countries, including, for example. In 1948, UNESCO recommended that Member States should make free primary education compulsory, in 1990, the World Conference on Education for All, in Jomtien, Thailand, launched a global movement to provide basic education for all children, youths and adults. Ten years later, the 2000 World Education Forum held in Dakar, Senegal, UNESCOs early activities in culture included, for example, the Nubia Campaign, launched in 1960. The purpose of the campaign was to move the Great Temple of Abu Simbel to keep it from being swamped by the Nile after construction of the Aswan Dam, during the 20-year campaign,22 monuments and architectural complexes were relocated. This was the first and largest in a series of campaigns including Mohenjo-daro, Fes, Kathmandu, Borobudur, the organizations work on heritage led to the adoption, in 1972, of the Convention concerning the Protection of the World Cultural and Natural Heritage. The World Heritage Committee was established in 1976 and the first sites inscribed on the World Heritage List in 1978, since then important legal instruments on cultural heritage and diversity have been adopted by UNESCO member states in 2003 and 2005
13.
Solar System
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The Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets, of the objects that orbit the Sun indirectly, the moons, two are larger than the smallest planet, Mercury. The Solar System formed 4.6 billion years ago from the collapse of a giant interstellar molecular cloud. The vast majority of the mass is in the Sun. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being composed of rock. The four outer planets are giant planets, being more massive than the terrestrials. All planets have almost circular orbits that lie within a flat disc called the ecliptic. The Solar System also contains smaller objects, the asteroid belt, which lies between the orbits of Mars and Jupiter, mostly contains objects composed, like the terrestrial planets, of rock and metal. Beyond Neptunes orbit lie the Kuiper belt and scattered disc, which are populations of trans-Neptunian objects composed mostly of ices, within these populations are several dozen to possibly tens of thousands of objects large enough that they have been rounded by their own gravity. Such objects are categorized as dwarf planets, identified dwarf planets include the asteroid Ceres and the trans-Neptunian objects Pluto and Eris. In addition to two regions, various other small-body populations, including comets, centaurs and interplanetary dust clouds. Six of the planets, at least four of the dwarf planets, each of the outer planets is encircled by planetary rings of dust and other small objects. The solar wind, a stream of charged particles flowing outwards from the Sun, the heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of the interstellar medium, it extends out to the edge of the scattered disc. The Oort cloud, which is thought to be the source for long-period comets, the Solar System is located in the Orion Arm,26,000 light-years from the center of the Milky Way. For most of history, humanity did not recognize or understand the concept of the Solar System, the invention of the telescope led to the discovery of further planets and moons. The principal component of the Solar System is the Sun, a G2 main-sequence star that contains 99. 86% of the known mass. The Suns four largest orbiting bodies, the giant planets, account for 99% of the mass, with Jupiter. The remaining objects of the Solar System together comprise less than 0. 002% of the Solar Systems total mass, most large objects in orbit around the Sun lie near the plane of Earths orbit, known as the ecliptic
14.
Pendulum clock
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A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element. The advantage of a pendulum for timekeeping is that it is an oscillator, it swings back and forth in a precise time interval dependent on its length. From its invention in 1656 by Christiaan Huygens until the 1930s, Pendulum clocks must be stationary to operate, any motion or accelerations will affect the motion of the pendulum, causing inaccuracies, so other mechanisms must be used in portable timepieces. They are now mostly for their decorative and antique value. The pendulum clock was invented in 1656 by Dutch scientist and inventor Christiaan Huygens, Huygens contracted the construction of his clock designs to clockmaker Salomon Coster, who actually built the clock. Huygens was inspired by investigations of pendulums by Galileo Galilei beginning around 1602, Galileo discovered the key property that makes pendulums useful timekeepers, isochronism, which means that the period of swing of a pendulum is approximately the same for different sized swings. Galileo had the idea for a clock in 1637, which was partly constructed by his son in 1649. These early clocks, due to their verge escapements, had wide pendulum swings of up to 100°, clockmakers realization that only pendulums with small swings of a few degrees are isochronous motivated the invention of the anchor escapement around 1670, which reduced the pendulums swing to 4–6°. The anchor became the standard escapement used in pendulum clocks, in addition to increased accuracy, the anchors narrow pendulum swing allowed the clocks case to accommodate longer, slower pendulums, which needed less power and caused less wear on the movement. The seconds pendulum,0.994 m long, in which each swing takes one second, the long narrow clocks built around these pendulums, first made by William Clement around 1680, became known as grandfather clocks. The increased accuracy resulting from these developments caused the hand, previously rare. The 18th and 19th century wave of innovation that followed the invention of the pendulum brought many improvements to pendulum clocks. Observation that pendulum clocks slowed down in summer brought the realization that thermal expansion and contraction of the rod with changes in temperature was a source of error. This was solved by the invention of temperature-compensated pendulums, the pendulum by George Graham in 1721. With these improvements, by the mid-18th century precision pendulum clocks achieved accuracies of a few seconds per week, until the 19th century, clocks were handmade by individual craftsmen and were very expensive. The rich ornamentation of pendulum clocks of this period indicates their value as symbols of the wealthy. The clockmakers of each country and region in Europe developed their own distinctive styles, by the 19th century, factory production of clock parts gradually made pendulum clocks affordable by middle-class families. During the Industrial Revolution, daily life was organized around the pendulum clock
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Leap year
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A leap year is a calendar year containing one additional day added to keep the calendar year synchronized with the astronomical or seasonal year. By inserting an additional day or month into the year, the drift can be corrected, a year that is not a leap year is called a common year. For example, in the Gregorian calendar, each year has 366 days instead of the usual 365. In the Bahai Calendar, a day is added when needed to ensure that the following year begins on the vernal equinox. For example, Christmas Day fell on a Tuesday in 2001, Wednesday in 2002, the length of a day is also occasionally changed by the insertion of leap seconds into Coordinated Universal Time, owing to the variability of Earths rotational period. Unlike leap days, leap seconds are not introduced on a regular schedule, in the Gregorian calendar, the standard calendar in most of the world, most years that are multiples of 4 are leap years. In each leap year, the month of February has 29 days instead of 28, adding an extra day to the calendar every four years compensates for the fact that a period of 365 days is shorter than a tropical year by almost 6 hours. Some exceptions to this rule are required since the duration of a tropical year is slightly less than 365.25 days. For example, the years 1700,1800, and 1900 were not leap years, over a period of four centuries, the accumulated error of adding a leap day every four years amounts to about three extra days. The Gregorian calendar therefore removes three leap days every 400 years, which is the length of its leap cycle and this is done by removing February 29 in the three century years that cannot be exactly divided by 400. The years 1600,2000 and 2400 are leap years, while 1700,1800,1900,2100,2200 and 2300 are common years, by this rule, the average number of days per year is 365 + 1⁄4 − 1⁄100 + 1⁄400 =365.2425. The rule can be applied to years before the Gregorian reform, the Gregorian calendar was designed to keep the vernal equinox on or close to March 21, so that the date of Easter remains close to the vernal equinox. The Accuracy section of the Gregorian calendar article discusses how well the Gregorian calendar achieves this design goal, the following pseudocode determines whether a year is a leap year or a common year in the Gregorian calendar. The year variable being tested is the representing the number of the year in the Gregorian calendar. Care should be taken in translating mathematical integer divisibility into specific programming languages, if then else if then else if then else February 29 is a date that usually occurs every four years, and is called leap day. This day is added to the calendar in leap years as a corrective measure, the Gregorian calendar is a modification of the Julian calendar first used by the Romans. The Roman calendar originated as a calendar and named many of its days after the syzygies of the moon, the new moon. The Nonae or nones was not the first quarter moon but was exactly one nundina or Roman market week of nine days before the ides and this is what we would call a period of eight days
16.
Lunar phase
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The lunar phase or phase of the moon is the shape of the illuminated portion of the Moon as seen by an observer on Earth. The lunar phases change cyclically as the Moon orbits the Earth, according to the positions of the Moon. The Moons rotation is locked by the Earths gravity, therefore the same lunar surface always faces Earth. This face is variously sunlit depending on the position of the Moon in its orbit, therefore, the portion of this hemisphere that is visible to an observer on Earth can vary from about 100% to 0%. The lunar terminator is the boundary between the illuminated and darkened hemispheres, each of the four intermediate lunar phases is roughly seven days but this varies slightly due to the elliptical shape of the Moons orbit. Aside from some craters near the lunar poles such as Shoemaker, all parts of the Moon see around 14.77 days of sunlight, in Western culture, the four principal lunar phases are new moon, first quarter, full moon, and third quarter. These are the instants when the Moons apparent geocentric celestial longitude minus the Suns apparent geocentric longitude is 0°, 90°, 180° and 270°. Each of these phases is instantaneous, lasting theoretically zero time, during the intervals between principal phases, the Moon appears either crescent-shaped or gibbous. These shapes, and the periods of time when the Moon shows them, are called the intermediate phases. They last, on average, one-quarter of a month, roughly 7.38 days, but their durations vary slightly because the Moons orbit is slightly elliptical. The descriptor waxing is used for a phase when the Moons apparent size is increasing, from new moon toward full moon. As the moon waxes, the lunar phases progress through new moon, crescent moon, first-quarter moon, gibbous moon, the moon is then said to wane as it passes through the gibbous moon, third-quarter moon, crescent moon and back to new moon. The terms old moon and new moon are not interchangeable, the old moon is a waning sliver until the moment it aligns with the sun and begins to wax, at which point it becomes new again. Half moon is used to mean the first- and third-quarter moons, while the term quarter refers to the extent of the moons cycle around the Earth. When a crescent Moon occurs, the phenomenon of earthshine may be apparent, in the Northern Hemisphere, if the left side of the Moon is dark then the light part is growing, and the Moon is referred to as waxing. If the right side of the Moon is dark then the part is shrinking. Assuming that the viewer is in the hemisphere, the right portion of the Moon is the part that is always growing. Nearer the Equator the Moon with its terminator will appear apparently horizontal during the morning and evening, the crescent Moon can open upward or downward, with the horns of the crescent pointing up or down, respectively
