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Robertus Anglicus
Robertus Anglicus or Robert the Englishman was an English astronomer of the thirteenth century. He taught at the University of Montpellier, and possibly also at Paris. He is known as the author of a 1271 commentary on the ''De Sphera Mundi'' of Johannes de Sacrobosco. It includes a significant reference to the state of the art in the technology of clockwork. He is also the author of the paper "Astrolabii Canones", which provided important principles for measurement on spheres. References *Notes {{DEFAULTSORT:Robertus Anglicus Medieval English astronomers 13th-century English people ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Montpellier
The University of Montpellier (french: Université de Montpellier) is a public university, public research university located in Montpellier, in south-east of France. Established in 1220, the University of Montpellier is one of the oldest universities in the world. The university was split into three universities (the University of Montpellier 1, the Montpellier 2 University, University of Montpellier 2 and the Paul Valéry University, Montpellier III, Paul Valéry University Montpellier 3) for 45 years from 1970 until 2015 when it was subsequently reunified by the merger of the two former, with the latter, now named Paul Valéry University, Montpellier III remaining a separate entity. History The university is considerably older than its formal founding date, associated with a papal bull issued by Pope Nicholas IV in 1289, combining all the centuries-old schools into a university, but the first statutes were given by Conrad of Urach in 1220. It is not known exactly when t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes De Sacrobosco
Johannes de Sacrobosco, also written Ioannes de Sacro Bosco, later called John of Holywood or John of Holybush ( 1195 – 1256), was a scholar, monk, and astronomer who taught at the University of Paris. He wrote a short introduction to the Hindu-Arabic numeral system. Judging from the number of manuscript copies that survive today, for the next 400 years it became the most widely read book on that subject. He also wrote a short textbook which was widely read and influential in Europe during the later medieval centuries as an introduction to astronomy. In his longest book, on the computation of the date of Easter, Sacrobosco correctly described the defects of the then-used Julian calendar, and recommended a solution similar to the modern Gregorian calendar three centuries before its implementation. Very little is known about the education and biography of Sacrobosco. For one thing, his year of death has been guessed at 1236, 1244, and 1256, each of which is plausible and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clockwork
Clockwork refers to the inner workings of either mechanical devices called clocks and watches (where it is also called the movement) or other mechanisms that work similarly, using a series of gears driven by a spring or weight. A clockwork mechanism is often powered by a clockwork motor, description of the clockwork motor in an antique phonograph consisting of a mainspring, a spiral torsion spring of metal ribbon. Energy is stored in the mainspring manually by ''winding it up'', turning a key attached to a ratchet which twists the mainspring tighter. Then the force of the mainspring turns the clockwork gears, until the stored energy is used up. The adjectives ''wind-up'' and ''spring-powered'' refer to mainspring-powered clockwork devices, which include clocks and watches, kitchen timers, music boxes, and wind-up toys. History The earliest known example of a clockwork mechanism is the Antikythera mechanism, a first-century BC geared analogue computer, somewhat astrolabe-li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medieval English Astronomers
In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire and transitioned into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early, High, and Late Middle Ages. Population decline, counterurbanisation, the collapse of centralized authority, invasions, and mass migrations of tribes, which had begun in late antiquity, continued into the Early Middle Ages. The large-scale movements of the Migration Period, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. In the 7th century, North Africa and the Middle East—most recently part of the Byzantine Emp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
