|
Jost Bürgi
Jost Bürgi (also ''Joost, Jobst''; Latinisation of names, Latinized surname ''Burgius'' or ''Byrgius''; 28 February 1552 – 31 January 1632), active primarily at the courts in Kassel and Prague, was a Swiss clockmaker, a maker of astronomical instruments and a mathematician. Life Bürgi was born in 1552 Lichtensteig, Toggenburg, at the time a subject territory of the Abbey of St. Gall (now part of the canton of St. Gallen, Switzerland). Not much is known about his life or education before his employment as astronomer and clockmaker at the court of William IV in Kassel in 1579; it has been theorized that he acquired his mathematical knowledge at Strasbourg, among others from Swiss mathematician Conrad Dasypodius, but there are no facts to support this. Although an autodidact, he was already during his lifetime considered as one of the most excellent mechanical engineers of his generation. His employer, William IV, Landgrave of Hesse-Kassel, in a letter to Tycho Brahe praise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichtensteig, Toggenburg
Lichtensteig is a municipality in the ''Wahlkreis'' (constituency) of Toggenburg in the canton of St. Gallen in Switzerland. History Lichtensteig was founded by the counts of Toggenburg in the early 13th century, first mentioned in 1228 as ''Liehtunsteige''. A market is mentioned in 1374, and the right to hold markets is confirmed in 1400. A letter of privileges issued by the lords of Raron 1439 confirms the existence of a council of twelve burghers, and the joint appointment of judges by the burghers and the land lords. The mayor ( Schultheiss) was appointed by the land lord from a list of candidates compiled by the burghers. After the acquisition of the Toggenburg by the Abbey of St. Gallen in 1468, Lichtensteig became the seat of the abbot's reeve. Abbot Ulrich Rösch in 1469 confirmed the existing privileges of Lichtensteig. The council declared support of the Reformation in 1528. Lichtensteig church from this time was used both by Reformed and Catholics, while schools were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conrad Dasypodius
Conrad Dasypodius (1532 – 26 April 1600) was a professor of mathematics in Strasbourg, Alsace. He was born in Frauenfeld, Thurgau, Switzerland. His first name was also rendered as Konrad or Conradus or Cunradus, and his last name has been alternatively stated as Rauchfuss, Rauchfuß, and Hasenfratz. He was the son of Petrus Dasypodius (Peter Hasenfuss) (1490–1559, or ''Peter Hasenfratz''), a humanist and lexicographer. In 1564, Dasypodius edited various parts of the ''Elements'' of Euclid. In the preface, he says that for 26 years it had been the rule at his school that all who were promoted from the classes to public lectures should learn Book I of the ''Elements'', but there were no longer any copies to be had so he was bringing out a new edition so as to maintain a good and fruitful regulation of his school. In 1568, Dasypodius published a work about the heliocentric theory of Nicolaus Copernicus, ''Hypotyposes orbium coelestium congruentes cum tabulis Alfonsinis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logarithm
In mathematics, the logarithm is the inverse function to exponentiation. That means the logarithm of a number to the base is the exponent to which must be raised, to produce . For example, since , the ''logarithm base'' 10 of is , or . The logarithm of to ''base'' is denoted as , or without parentheses, , or even without the explicit base, , when no confusion is possible, or when the base does not matter such as in big O notation. The logarithm base is called the decimal or common logarithm and is commonly used in science and engineering. The natural logarithm has the number as its base; its use is widespread in mathematics and physics, because of its very simple derivative. The binary logarithm uses base and is frequently used in computer science. Logarithms were introduced by John Napier in 1614 as a means of simplifying calculations. They were rapidly adopted by navigators, scientists, engineers, surveyors and others to perform high-a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valentinus Otho
Valentinus Otho (also Valentin Otto; born around 1545–46 possibly in Magdeburg – 8 April 1603 in Heidelberg) was a German mathematician and astronomer. Life In 1573 he came to Wittenberg, proposing to Johannes Praetorius an approximation of pi as \pi \approx \tfrac (now known as '' milü'', as named by its first discover, the Chinese mathematician Zu Chongzhi). In 1575 he supported Georg Joachim Rheticus in his trigonometric tables. The next year they went to Kaschau in Hungary where Rheticus died. Thus, Otho inherited the De revolutionibus manuscript of Nicolaus Copernicus that Rheticus had published in 1543 in Nuremberg. Otho became Professor for mathematics in Wittenberg, but when the rulers of Saxony did not support the tables, he moved to Heidelberg Heidelberg (; Palatine German: ') is a city in the German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914, of which roughly a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes Kepler
Johannes Kepler (; ; 27 December 1571 – 15 November 1630) was a German astronomer, mathematician, astrologer, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his laws of planetary motion, and his books ''Astronomia nova'', ''Harmonice Mundi'', and ''Epitome Astronomiae Copernicanae''. These works also provided one of the foundations for Newton's theory of universal gravitation. Kepler was a mathematics teacher at a seminary school in Graz, where he became an associate of Prince Hans Ulrich von Eggenberg. Later he became an assistant to the astronomer Tycho Brahe in Prague, and eventually the imperial mathematician to Emperor Rudolf II and his two successors Matthias and Ferdinand II. He also taught mathematics in Linz, and was an adviser to General Wallenstein. Additionally, he did fundamental work in the field of optics, invented an improved version of the refracting (or Keplerian) telescope, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudolf II, Holy Roman Emperor
Rudolf II (18 July 1552 – 20 January 1612) was Holy Roman Emperor (1576–1612), King of Hungary and Croatia (as Rudolf I, 1572–1608), King of Bohemia (1575–1608/1611) and Archduke of Austria (1576–1608). He was a member of the House of Habsburg. Rudolf's legacy has traditionally been viewed in three ways:Hotson, 1999. an ineffectual ruler whose mistakes led directly to the Thirty Years' War; a great and influential patron of Northern Mannerist art; and an intellectual devotee of occult arts and learning which helped seed what would be called the Scientific Revolution. Determined to unify Christendom, he initiated the Long Turkish War (1593–1606) with the Ottoman Empire. Exhausted by war, his citizens in Hungary revolted in the Bocskai Uprising, which led to more authority given to his brother Matthias. Under his reign, there was a policy of toleration towards Judaism. Early life Rudolf was born in Vienna on 18 July 1552. He was the eldest son and successor of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jürgen Hamel
Jürgen Hamel (born 6 June 1951) is a German astronomy historian. His research areas are the history of astronomy in the Middle Ages and the early modern period, the period around 1800, the history of astrophysics, astronomy and cultural history, and the history of astronomical instruments.„Vorgestellt.“ 24 January 2002. Auf Leibniz-Sozietät, retrieved 21 March 2021. Life and career Hamel was born in . After an apprenticeship as a , he studied philosophy, history and education at the and then worked as ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicolaus Copernicus Gesamtausgabe
The ''Nicolaus-Copernicus-Gesamtausgabe'' (''Nicolaus Copernicus Complete Edition'') is a comprehensive, commented collection of works by, about, and related to Nicolaus Copernicus. The ''Gesamtausgabe'' includes Copernicus's surviving manuscripts and notes, his published writings, other authors' commentary about Copernicus and his works, a bibliography, and a biography. Compilation of the series began in 1973 to commemorate the 500th anniversary of Copernicus's birth. The first volume is the astronomer's landmark work, ''De revolutionibus orbium coelestium'' (''On the Revolutions of the Heavenly Spheres''), which expounded Copernicus's heliocentric theory of the universe. The set is published by Akademie Verlag in Berlin, Germany. Volumes *I: ''De revolutionibus orbium coelestium'', 1974, *II: *III/1: ''Kommentar zu "De revolutionibus"'', 1998, *III/3: ''De Revolutionibus. Die erste deutsche Übersetzung in der Graz Graz (; sl, Gradec) is the capital city o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graz
Graz (; sl, Gradec) is the capital city of the Austrian state of Styria and second-largest city in Austria after Vienna. As of 1 January 2021, it had a population of 331,562 (294,236 of whom had principal-residence status). In 2018, the population of the Graz larger urban zone (LUZ) stood at 652,654, based on principal-residence status. Graz is known as a college and university city, with four colleges and four universities. Combined, the city is home to more than 60,000 students. Its historic centre ('' Altstadt'') is one of the best-preserved city centres in Central Europe. In 1999, the city's historic centre was added to the UNESCO list of World Heritage Sites and in 2010 the designation was expanded to include Eggenberg Palace (german: Schloss Eggenberg) on the western edge of the city. Graz was designated the Cultural Capital of Europe in 2003 and became a City of Culinary Delights in 2008. Etymology The name of the city, Graz, formerly spelled Gratz, most likely stems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Revolutionibus Orbium Coelestium
''De revolutionibus orbium coelestium'' (English translation: ''On the Revolutions of the Heavenly Spheres'') is the seminal work on the heliocentric theory of the astronomer Nicolaus Copernicus (1473–1543) of the Polish Renaissance. The book, first printed in 1543 in Nuremberg, Holy Roman Empire, offered an alternative model of the universe to Ptolemy's geocentric system, which had been widely accepted since ancient times. History Copernicus initially outlined his system in a short, untitled, anonymous manuscript that he distributed to several friends, referred to as the ''Commentariolus''. A physician's library list dating to 1514 includes a manuscript whose description matches the ''Commentariolus'', so Copernicus must have begun work on his new system by that time. Most historians believe that he wrote the ''Commentariolus'' after his return from Italy, possibly only after 1510. At this time, Copernicus anticipated that he could reconcile the motion of the Earth with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicolaus Reimers
Nicolaus Reimers Baer (2 February 1551 – 16 October 1600), also ''Reimarus Ursus'', ''Nicolaus Reimers Bär'' or ''Nicolaus Reymers Baer'', was an astronomer and imperial mathematician to Emperor Rudolf II. Due to his family's background, he was also known as ''Bär'', Latinized to ''Ursus'' ("bear"). Reimers was born in Hennstedt and received hardly any education in his youth, herding pigs until the age of 18. Yet, Heinrich Rantzau discovered his talents and employed him from 1574 to 1584 as geometer. Accordingly, Reimers in 1580 published a Latin Grammar and in 1583 his ''Geodaesia Ranzoviana''. Rantzau also arranged a meeting with Tycho Brahe. From 1585 to 1586 he was employed as a private tutor in Pomerania and from 1586 to 1587, Reimers stayed at the court of William IV, Landgrave of Hesse-Kassel in Kassel, where he met Swiss instrument maker Jost Bürgi (1552–1632). Both were autodidacts and thus had a similar background. As Bürgi did not understand Latin, Reime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moritz Cantor
Moritz Benedikt Cantor (23 August 1829 – 10 April 1920) was a German historian of mathematics. Biography Cantor was born at Mannheim. He came from a Sephardi Jewish family that had emigrated to the Netherlands from Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ..., another branch of which had established itself in Russia. In his early youth, Moritz Cantor was not strong enough to go to school, and his parents decided to educate him at home. Later, however, he was admitted to an advanced class of the Gymnasium in Mannheim. From there he went to the University of Heidelberg in 1848, and soon after to the University of Göttingen, where he studied under Carl Friedrich Gauss, Gauss and Heinrich Martin Weber, Weber, and where Stern awakened in him a strong interest in histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
