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• Christen_Sørensen_Longomontanus abstract "Christen Sørensen Longomontanus (or Longberg) (4 October 1562 – 8 October 1647) was a Danish astronomer.The name Longomontanus was a Latinized form of the name of the village of Lomborg, Jutland, Denmark, where he was born. His father, a laborer called Søren, or Severin, died when Christen was eight years old. An uncle took charge of the child, and had him educated at Lemvig; but after three years sent him back to his mother, who needed his help to work the fields. She agreed that he could study during the winter months with the clergyman of the parish; this arrangement continued until 1577, when the ill-will of some of his relatives and his own desire for knowledge caused him to run away to Viborg.There he attended the grammar school, working as a labourer to pay his expenses, and in 1588 went to Copenhagen with a high reputation for learning and ability. Engaged by Tycho Brahe in 1589 as his assistant in his great astronomical observatory of Uraniborg, he rendered invaluable service for eight years. Having left the island of Hven with his master, he obtained his discharge at Copenhagen on 1 June 1597, in order to study at some German universities. He rejoined Tycho at Prague in January 1600, and having completed the Tychonic lunar theory, turned homeward again in August.He visited Frauenburg, where Copernicus had made his observations, took a master's degree at Rostock, and at Copenhagen found a patron in Christian Friis, chancellor of Denmark, who employed him in his household. Appointed in 1603 rector of the school of Viborg, he was elected two years later to a professorship in the University of Copenhagen, and his promotion to the chair of mathematics ensued in 1607. This post was held by Longomontanus till his death in 1647.Longomontanus was not an advanced thinker. He adhered to Tycho's erroneous views about refraction, believed that comets were messengers of evil, and imagined that he had squared the circle. He found that the circle whose diameter is 43 has for its circumference the square root of 18252 which gives 3.14185... (or 22⁄7) for the value of π. John Pell and others tried in vain to convince him of his error. He inaugurated, at Copenhagen in 1632, the erection of a stately astronomical tower, but did not live to witness its completion. King Christian IV of Denmark, to whom he dedicated his Astronomia Danica, an exposition of the Tychonic system of the world, conferred upon him the canonry of Lunden in Schleswig.However, it was Longomontanus who really developed Tycho's geoheliocentric model empirically and publicly to common acceptance in the 17th century in his 1622 astronomical tables. When Tycho died in 1601, his program for the restoration of astronomy was unfinished. The observational aspects were complete, but two important tasks remained, namely the selection and integration of the data into accounts of the motions of the planets, and the presentation of the results on the entire program in the form of a systematic treatise. Longomontanus, Tycho's sole disciple, assumed the responsibility and fulfilled both tasks in his voluminous Astronomia Danica (1622). Regarded as the testament of Tycho, the work was eagerly received in seventeenth-century astronomical literature. But unlike Tycho's, his geoheliocentric model gave the Earth a daily rotation as in the models of Ursus and Roslin, and which is sometimes called the 'semi-Tychonic' system. As an indication of his book's popularity and of the semi-Tychonic system, it was reprinted in 1640 and 1663. Having originally worked on calculating the Martian orbit for Tycho with Kepler, he had already modelled its orbit to within 2 arcminutes error in longitude in his geoheliocentric model when Kepler had still only achieved 8 arcminutes error in his heliocentric system, but not yet using elliptical orbits. Some historians of science claim Kepler’s 1627 Rudolphine Tables based on Tycho Brahe’s observations were more accurate than any previous tables. But nobody has ever demonstrated they were more accurate than Longomontanus’s 1622 Danish Astronomy tables, also based upon Tycho’s observations.".
• Christen_Sørensen_Longomontanus almaMater University_of_Rostock.
• Christen_Sørensen_Longomontanus birthDate "1562-10-04".
• Christen_Sørensen_Longomontanus birthPlace Denmark.
• Christen_Sørensen_Longomontanus birthPlace Jutland.
• Christen_Sørensen_Longomontanus deathDate "1647-10-08".
• Christen_Sørensen_Longomontanus deathPlace Copenhagen.
• Christen_Sørensen_Longomontanus field Astronomy.
• Christen_Sørensen_Longomontanus influencedBy Tycho_Brahe.
• Christen_Sørensen_Longomontanus nationality Denmark.
• Christen_Sørensen_Longomontanus thumbnail Logomontanus.jpg?width=300.
• Christen_Sørensen_Longomontanus wikiPageExternalLink christenlongomon.html.
• Christen_Sørensen_Longomontanus wikiPageID "491567".
• Christen_Sørensen_Longomontanus wikiPageLength "7510".
• Christen_Sørensen_Longomontanus wikiPageOutDegree "41".
• Christen_Sørensen_Longomontanus wikiPageRevisionID "703279015".
• Christen_Sørensen_Longomontanus wikiPageWikiLink Astronomer.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Astronomy.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Category:1562_births.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Category:1647_deaths.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Category:Danish_astronomers.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Category:Rectors_of_the_University_of_Copenhagen.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Christian_Friis.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Christian_IV_of_Denmark.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Comet.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Copenhagen.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Denmark.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Duchy_of_Schleswig.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Grammar_school.
• Christen_Sørensen_Longomontanus wikiPageWikiLink John_Pell.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Jutland.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Latin.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Lemvig.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Longomontanus_(crater).
• Christen_Sørensen_Longomontanus wikiPageWikiLink Lunar_craters.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Mathematics.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Nicolaus_Copernicus.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Prague.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Refraction.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Rundetårn.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Squaring_the_circle.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Tycho_(crater).
• Christen_Sørensen_Longomontanus wikiPageWikiLink Tycho_Brahe.
• Christen_Sørensen_Longomontanus wikiPageWikiLink University_of_Copenhagen.
• Christen_Sørensen_Longomontanus wikiPageWikiLink University_of_Rostock.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Uraniborg.
• Christen_Sørensen_Longomontanus wikiPageWikiLink Ven_(Sweden).
• Christen_Sørensen_Longomontanus wikiPageWikiLink Viborg,_Denmark.
• Christen_Sørensen_Longomontanus wikiPageWikiLink File:Longomontanus_-_Inventio_quadraturae_circuli,_1634_-_194280.jpg.
• Christen_Sørensen_Longomontanus wikiPageWikiLinkText "Christen Sørensen Longomontanus".
• Christen_Sørensen_Longomontanus almaMater University_of_Rostock.
• Christen_Sørensen_Longomontanus birthDate "1562-10-04".
• Christen_Sørensen_Longomontanus birthPlace Denmark.
• Christen_Sørensen_Longomontanus birthPlace Jutland.
• Christen_Sørensen_Longomontanus caption "Christen Sørensen Longomontanus".
• Christen_Sørensen_Longomontanus deathDate "1647-10-08".
• Christen_Sørensen_Longomontanus deathPlace Copenhagen.
• Christen_Sørensen_Longomontanus field Astronomy.
• Christen_Sørensen_Longomontanus imageSize "200".
• Christen_Sørensen_Longomontanus influences Tycho_Brahe.
• Christen_Sørensen_Longomontanus name "Christen Sørensen Longomontanus".
• Christen_Sørensen_Longomontanus nationality Denmark.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Authority_control.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Birth_date.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Citation_needed.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Death_date_and_age.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:EB1911.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Frac.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Infobox_scientist.
• Christen_Sørensen_Longomontanus wikiPageUsesTemplate Template:Reflist.
• Christen_Sørensen_Longomontanus workInstitutions University_of_Copenhagen.
• Christen_Sørensen_Longomontanus subject Category:1562_births.
• Christen_Sørensen_Longomontanus subject Category:1647_deaths.
• Christen_Sørensen_Longomontanus subject Category:Danish_astronomers.
• Christen_Sørensen_Longomontanus subject Category:Rectors_of_the_University_of_Copenhagen.
• Christen_Sørensen_Longomontanus hypernym Astronomer.
• Christen_Sørensen_Longomontanus type Agent.
• Christen_Sørensen_Longomontanus type Person.
• Christen_Sørensen_Longomontanus type Scientist.
• Christen_Sørensen_Longomontanus type Person.
• Christen_Sørensen_Longomontanus type Diacritic.
• Christen_Sørensen_Longomontanus type Redirect.
• Christen_Sørensen_Longomontanus type Scientist.
• Christen_Sørensen_Longomontanus type Agent.
• Christen_Sørensen_Longomontanus type NaturalPerson.
• Christen_Sørensen_Longomontanus type Thing.
• Christen_Sørensen_Longomontanus type Q215627.
• Christen_Sørensen_Longomontanus type Q5.
• Christen_Sørensen_Longomontanus type Q901.
• Christen_Sørensen_Longomontanus type Person.
• Christen_Sørensen_Longomontanus comment "Christen Sørensen Longomontanus (or Longberg) (4 October 1562 – 8 October 1647) was a Danish astronomer.The name Longomontanus was a Latinized form of the name of the village of Lomborg, Jutland, Denmark, where he was born. His father, a laborer called Søren, or Severin, died when Christen was eight years old. An uncle took charge of the child, and had him educated at Lemvig; but after three years sent him back to his mother, who needed his help to work the fields.".
• Christen_Sørensen_Longomontanus label "Christen Sørensen Longomontanus".
• Christen_Sørensen_Longomontanus sameAs Q729315.
• Christen_Sørensen_Longomontanus sameAs Christen_Sørensen_Longomontanus.
• Christen_Sørensen_Longomontanus sameAs Christian_Severin.
• Christen_Sørensen_Longomontanus sameAs Christen_Sørensen_Longomontanus.
• Christen_Sørensen_Longomontanus sameAs Christen_Sørensen_Longomontanus.
• Christen_Sørensen_Longomontanus sameAs Christian_Sørensen_Longomontanus.
• Christen_Sørensen_Longomontanus sameAs Christen_Sørensen_Longomontanus.
• Christen_Sørensen_Longomontanus sameAs ロンゴモンタヌス.

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