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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 he 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 masters 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 he held till his death.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 ... 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.[citation needed]".
- 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 thumbnail Logomontanus.jpg?width=300.
- Christen_Sørensen_Longomontanus wikiPageID "491567".
- Christen_Sørensen_Longomontanus wikiPageRevisionID "605386881".
- 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 dateOfBirth "1562-10-04".
- Christen_Sørensen_Longomontanus dateOfDeath "1647-10-08".
- 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 name "Longomontanus, Christen Sorensen".
- Christen_Sørensen_Longomontanus nationality Denmark.
- Christen_Sørensen_Longomontanus placeOfBirth Denmark.
- Christen_Sørensen_Longomontanus placeOfBirth Jutland.
- Christen_Sørensen_Longomontanus placeOfDeath Copenhagen.
- Christen_Sørensen_Longomontanus shortDescription "Danish astronomer".
- Christen_Sørensen_Longomontanus workInstitutions University_of_Copenhagen.
- Christen_Sørensen_Longomontanus description "Danish astronomer".
- Christen_Sørensen_Longomontanus subject Category:1562_births.
- Christen_Sørensen_Longomontanus subject Category:1647_deaths.
- Christen_Sørensen_Longomontanus subject Category:Danish_astronomers.
- Christen_Sørensen_Longomontanus type Agent.
- Christen_Sørensen_Longomontanus type Person.
- Christen_Sørensen_Longomontanus type Scientist.
- Christen_Sørensen_Longomontanus type Person.
- Christen_Sørensen_Longomontanus type Q215627.
- Christen_Sørensen_Longomontanus type Q5.
- Christen_Sørensen_Longomontanus type Agent.
- Christen_Sørensen_Longomontanus type NaturalPerson.
- Christen_Sørensen_Longomontanus type Thing.
- 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 he 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 label "Christen Sørensen Longomontanus".
- Christen_Sørensen_Longomontanus label "Christen Sørensen Longomontanus".
- Christen_Sørensen_Longomontanus label "Christian Longomontanus".
- Christen_Sørensen_Longomontanus label "Christian Severin".
- Christen_Sørensen_Longomontanus label "Christian Sørensen Longomontanus".
- Christen_Sørensen_Longomontanus label "Лонгомонтан, Христиан-Северин".
- Christen_Sørensen_Longomontanus label "ロンゴモンタヌス".
- Christen_Sørensen_Longomontanus sameAs Christen_S%C3%B8rensen_Longomontanus.
- Christen_Sørensen_Longomontanus sameAs Christian_Severin.
- 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.
- Christen_Sørensen_Longomontanus sameAs 크리스티안_쇠렌센_롱고몬타누스.
- Christen_Sørensen_Longomontanus sameAs Christian_Longomontanus.
- Christen_Sørensen_Longomontanus sameAs Q729315.
- Christen_Sørensen_Longomontanus sameAs Q729315.
- Christen_Sørensen_Longomontanus wasDerivedFrom Christen_Sørensen_Longomontanus?oldid=605386881.
- Christen_Sørensen_Longomontanus depiction Logomontanus.jpg.
- Christen_Sørensen_Longomontanus givenName "Christen Sorensen".
- Christen_Sørensen_Longomontanus name "Christen Sorensen Longomontanus".
- Christen_Sørensen_Longomontanus surname "Longomontanus".