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Elly Dekker
Elisabeth (Elly) Dekker ( Haarlem, 1943) is a Dutch astronomer and science historian, specialising in the history of astronomy. She studied theoretical physics and astronomy at Utrecht University.independent.academia.edu ''EllyDekker'' Consulted on 12 February 2021. In 1975 she obtained a PhD in astronomy at Leiden University with the thesis ''Spiral structure and the dynamics of flat stellar systems'' supervised by Hendrik C. van de Hulst. From 1978-1988 she was a curator of |
Haarlem
Haarlem (; predecessor of ''Harlem'' in English) is a city and municipality in the Netherlands. It is the capital of the province of North Holland. Haarlem is situated at the northern edge of the Randstad, one of the most populated metropolitan areas in Europe; it is also part of the Amsterdam metropolitan area, being located about 15 km to the west of the core city of Amsterdam. Haarlem had a population of in . Haarlem was granted city status or '' stadsrechten'' in 1245, although the first city walls were not built until 1270. The modern city encompasses the former municipality of Schoten as well as parts that previously belonged to Bloemendaal and Heemstede. Apart from the city, the municipality of Haarlem also includes the western part of the village of Spaarndam. Newer sections of Spaarndam lie within the neighbouring municipality of Haarlemmermeer. Geography Haarlem is located on the river Spaarne, giving it its nickname 'Spaarnestad' (Spaarne city). It is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobus Kapteyn
Prof Jacobus Cornelius Kapteyn FRS FRSE LLD (19 January 1851 – 18 June 1922) was a Dutch astronomer. He carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation. Kapteyn was also among the first to suggest the existence of dark matter using stellar velocities as early as 1922. Kapteyn's family and early life Kapteyn was born in Barneveld in the Netherlands to Gerrit J. and Elisabeth C. (née Koomans) Kapteyn, and was one of 15 children. Many of the Kapteyns were gifted in mathematics and physics. He passed his entrance exams for university at the age of 16 but Kapteyn's parents wouldn't allow him to go until the following year. He went to the University of Utrecht to study mathematics and physics in 1868. He did very well in his studies and when he graduated he was magna cum laude. This laid the foundation for his later career. Jacobus Kapteyn was a very doting father during the earlier years in his career and took an in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1943 Births
Events Below, the events of World War II have the "WWII" prefix. January * January 1 – WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed and 137,650 captured. * January 4 – WWII: Greek-Polish athlete and saboteur Jerzy Iwanow-Szajnowicz is executed by the Germans at Kaisariani. * January 11 ** The United States and United Kingdom revise previously unequal treaty relationships with the Republic of China. ** Italian-American anarchist Carlo Tresca is assassinated in New York City. * January 13 – Anti-Nazi protests in Sofia result in 200 arrests and 36 executions. * January 14 – 24 – WWII: Casablanca Conference: Franklin D. Roosevelt, President of the United States; Winston Churchill, Prime Minister of the United Kingdom; and Generals Charles de Gaulle and Henri Giraud of the Free French forces meet secretly at the Anfa Hotel in Casablanca, Morocco, to plan the Allied European strategy for the next stage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living People
Related categories * :Year of birth missing (living people) / :Year of birth unknown * :Date of birth missing (living people) / :Date of birth unknown * :Place of birth missing (living people) / :Place of birth unknown * :Year of death missing / :Year of death unknown * :Date of death missing / :Date of death unknown * :Place of death missing / :Place of death unknown * :Missing middle or first names See also * :Dead people * :Template:L, which generates this category or death years, and birth year and sort keys. : {{DEFAULTSORT:Living people 21st-century people People by status ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museo Galileo
Museo Galileo, the former ''Istituto e Museo di Storia della Scienza'' (Institute and Museum of the History of Science) is located in Florence, Italy, in Piazza dei Giudici, along the River Arno and close to the Uffizi Gallery. The museum, dedicated to astronomer and scientist Galileo Galilei, is housed in Palazzo Castellani, an 11th-century building which was then known as the Castello d’Altafronte. Museo Galileo owns one of the world's major collection of scientific instruments, which bears evidence of the role that the Medici and Lorraine Grand Dukes attached to science and scientists. The Museo di Storia della Scienza has re-opened to the public under the new name ''Museo Galileo'' since June 10, 2010, after a two-year closure due to redesigning and renovation works. It has been inaugurated four hundred years after the publication in March 1610 of Galileo's ''Sidereus Nuncius'' (''The Starry Messenger''). The museum The museum features the valuable scientific instruments fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leiden Aratea
Leiden, Universiteitsbibliotheek, VLQ 79, also called the Leiden Aratea, is an illuminated copy of an astronomical treatise by Germanicus, based on the ''Phaenomena'' of Aratus. The manuscript was created in the region of Lorraine and has been dated to around 816. It was produced at the court of Louis the Pious, who ruled from 814–840. It is one of the four Carolingian codices that were produced in his court. There are many translations and copies of this text, so it is very well known throughout the Middle East and Europe. There are 99 extant folios measuring ; four were lost before 1600. Besides these four, the manuscript is complete. The work contains 39 miniatures, including some of the first artistic depictions on paper of the Greek constellations. The artist has made no effort to place the stars correctly according to their positions in the sky so the images cannot be considered true star charts. History Provenance The Leiden Aratea was created for a wealthy patron, po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspar Vopel
Caspar Vopel (1511–1561) was a German cartographer and instrument maker. Born in Medebach, he studied mathematics and medicine at the University of Cologne in 1526–1529. He taught mathematics at the Gymnasium of Cologne and in the early 1530s established a workshop to produce celestial and terrestrial globes, armillary spheres, sundials, Quadrant (instrument), quadrants and astrolabes. An exemplar of Vopel’s 1536 globe is held at Tenri University Library, Nara. In 1545 he began to prepare maps and atlases. His mappemonde of 1545 is titled ''NOVA ET INTEGRA VNIVERSALISQVE ORBIS TOTIVS IVXTA GERMANVM NEOTERICORVM TRADITIONEM DESCRIPTIO'' (A New Complete and Universal Description of the Whole World, according to the Modern German Tradition). Vopel is sometimes credited with the promotion of the ancient asterism Coma Berenices to constellation status. References External links * {{DEFAULTSORT:Vopel, Caspar German cartographers 1511 births 1561 deaths People from Medebach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eudoxus Of Cnidus
Eudoxus of Cnidus (; grc, Εὔδοξος ὁ Κνίδιος, ''Eúdoxos ho Knídios''; ) was an ancient Greek astronomer, mathematician, scholar, and student of Archytas and Plato. All of his original works are lost, though some fragments are preserved in Hipparchus' commentary on Aratus's poem on astronomy. '' Sphaerics'' by Theodosius of Bithynia may be based on a work by Eudoxus. Life Eudoxus was born and died in Cnidus (also spelled Knidos), which was a city on the southwest coast of Asia Minor. The years of Eudoxus' birth and death are not fully known but the range may have been , or . His name Eudoxus means "honored" or "of good repute" (, from ''eu'' "good" and ''doxa'' "opinion, belief, fame"). It is analogous to the Latin name Benedictus. Eudoxus's father, Aeschines of Cnidus, loved to watch stars at night. Eudoxus first traveled to Tarentum to study with Archytas, from whom he learned mathematics. While in Italy, Eudoxus visited Sicily, where he studied ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal For The History Of Astronomy
''Journal for the History of Astronomy'' (''JHA'') is a peer-reviewed academic journal that publishes papers in the History of Astronomy from earliest times to the present, and in history in the service of astronomy. The journal's founding editor was Michael Hoskin of Cambridge University and it is currently edited by James Evans of the University of Puget Sound. It has been in publication since 1970 and is currently published by SAGE Publications SAGE Publishing, formerly SAGE Publications, is an American independent publishing company founded in 1965 in New York by Sara Miller McCune and now based in Newbury Park, California. It publishes more than 1,000 journals, more than 800 bo .... From 1979 to 2002, ''Archaeoastronomy'' was published as a supplement to JHA, but was incorporated into ''JHA'' in 2003. Abstracting and indexing ''Journal for the History of Astronomy'' is abstracted and indexed in, among other databases: SCOPUS, and the Social Sciences Citation Index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carolingian Renaissance
The Carolingian Renaissance was the first of three medieval renaissances, a period of cultural activity in the Carolingian Empire. It occurred from the late 8th century to the 9th century, taking inspiration from the Christian Roman Empire of the fourth century. During this period, there was an increase of literature, writing, visual arts, architecture, music, jurisprudence, liturgical reforms, and scriptural studies. The movement occurred mostly during the reigns of Carolingian rulers Charlemagne and Louis the Pious. It was supported by the scholars of the Carolingian court, notably Alcuin of York. Charlemagne's '' Admonitio generalis'' (789) and '' Epistola de litteris colendis'' served as manifestos. The effects of this cultural revival were mostly limited to a small group of court ''literati''. According to John Contreni, "it had a spectacular effect on education and culture in Francia, a debatable effect on artistic endeavors, and an unmeasurable effect on what mattered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadrant (instrument)
A quadrant is an instrument used to measure angles up to 90°. Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day. Its earliest recorded usage was in ancient India in Rigvedic times by Rishi Atri to observe a solar eclipse. It was then proposed by Ptolemy as a better kind of astrolabe. Several different variations of the instrument were later produced by medieval Muslim astronomers. Mural quadrants were important astronomical instruments in 18th-century European observatories, establishing a use for positional astronomy. Etymology The term ''quadrant'', meaning one fourth, refers to the fact that early versions of the instrument were derived from astrolabes. The quadrant condensed the workings of the astrolabe into an area one fourth the size of the astrolabe face; it was essentially a quarter of an astrolabe. History During Rigvedic times in ancient India, quadrants called 'Tureeyam's were use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrolabe
An astrolabe ( grc, ἀστρολάβος ; ar, ٱلأَسْطُرلاب ; persian, ستارهیاب ) is an ancient astronomical instrument that was a handheld model of the universe. Its various functions also make it an elaborate inclinometer and an analog calculation device capable of working out several kinds of problems in astronomy. In its simplest form it is a metal disc with a pattern of wires, cutouts, and perforations that allows a user to calculate astronomical positions precisely. Historically used by astronomers, it is able to measure the altitude above the horizon of a celestial body, day or night; it can be used to identify stars or planets, to determine local latitude given local time (and vice versa), to survey, or to triangulate. It was used in classical antiquity, the Islamic Golden Age, the European Middle Ages and the Age of Discovery for all these purposes. The astrolabe's importance comes not only from the early developments into the study of ast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
