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- Zij-i_Sultani abstract "Zīj-i Sultānī (Persian: زیجِ سلطانی) is a Zij astronomical table and star catalogue that was published by Ulugh Beg in 1437. It was the joint product of the work of a group of Muslim astronomers working under the patronage of Ulugh Beg at Samarkand's Ulugh Beg Observatory. These astronomers included Jamshīd al-Kāshī and Ali Qushji, among others.The Zij-i-Sultani is generally considered the most accurate and extensive star catalogue up to its time, surpassing its predecessors, including Ptolemy's work, Abd al-Rahman al-Sufi's Book of Fixed Stars, and the Maragheh observatory's Zij-i Ilkhani. It was not surpassed until the work of Taqi al-Din and Tycho Brahe in the 16th century.The serious errors which Ulugh Beg found in previous Zij star catalogues (many of the earlier ones were simply updates on Ptolemy's work, adding the effect of precession to the longitudes) induced him to redetermine the positions of 992 fixed stars, to which he added 27 stars from al-Sufi's Book of Fixed Stars (964), which were too far south for observation from Samarkand. This catalogue, one of the most original of the Middle Ages, was edited by Thomas Hyde at Oxford in 1665 under the title Tabulae longitudinis et latitudinis stellarum fixarum ex observatione Ulugbeighi, by G. Sharpe in 1767, and in 1843 by Francis Baily in vol. xiii. of the Memoirs of the Royal Astronomical Society.In 1437, Ulugh Beg determined the length of the sidereal year as 365.2570370...d = 365d 6h 10m 8s (an error +58s). In his measurements over many years he used a 50 m high gnomon. This value was improved by 28s, 88 years later in 1525 by Nicolaus Copernicus (1473-1543), who appealed to the estimation of Thabit ibn Qurra (826-901), which was accurate to +2s. However, Ulugh Beg later measured another more precise value as 365d 5h 49m 15s, which has an error of +25s, making it more accurate than Copernicus' estimate which had an error of +30s. Ulugh Beg also determined the Earth's axial tilt as 23.52 degrees, which remains the most accurate measurement to date. It was more accurate than later measurements by Copernicus and Tycho Brahe, and matches the currently accepted value precisely.".
- Zij-i_Sultani wikiPageID "5962454".
- Zij-i_Sultani wikiPageLength "3603".
- Zij-i_Sultani wikiPageOutDegree "32".
- Zij-i_Sultani wikiPageRevisionID "673010811".
- Zij-i_Sultani wikiPageWikiLink Abd_al-Rahman_al-Sufi.
- Zij-i_Sultani wikiPageWikiLink Ali_Qushji.
- Zij-i_Sultani wikiPageWikiLink Astronomy_in_the_medieval_Islamic_world.
- Zij-i_Sultani wikiPageWikiLink Axial_precession.
- Zij-i_Sultani wikiPageWikiLink Axial_tilt.
- Zij-i_Sultani wikiPageWikiLink Book_of_Fixed_Stars.
- Zij-i_Sultani wikiPageWikiLink Category:1437_books.
- Zij-i_Sultani wikiPageWikiLink Category:Astrological_texts.
- Zij-i_Sultani wikiPageWikiLink Category:Astronomical_tables.
- Zij-i_Sultani wikiPageWikiLink Category:Astronomical_works_of_medieval_Islam.
- Zij-i_Sultani wikiPageWikiLink Francis_Baily.
- Zij-i_Sultani wikiPageWikiLink Gnomon.
- Zij-i_Sultani wikiPageWikiLink Jamshīd_al-Kāshī.
- Zij-i_Sultani wikiPageWikiLink Maragheh_observatory.
- Zij-i_Sultani wikiPageWikiLink Nicolaus_Copernicus.
- Zij-i_Sultani wikiPageWikiLink Ptolemy.
- Zij-i_Sultani wikiPageWikiLink Samarkand.
- Zij-i_Sultani wikiPageWikiLink Sidereal_year.
- Zij-i_Sultani wikiPageWikiLink Star_catalogue.
- Zij-i_Sultani wikiPageWikiLink Taqi_ad-Din_Muhammad_ibn_Maruf.
- Zij-i_Sultani wikiPageWikiLink Thomas_Hyde.
- Zij-i_Sultani wikiPageWikiLink Thābit_ibn_Qurra.
- Zij-i_Sultani wikiPageWikiLink Tycho_Brahe.
- Zij-i_Sultani wikiPageWikiLink Ulugh_Beg.
- Zij-i_Sultani wikiPageWikiLink Ulugh_Beg_Observatory.
- Zij-i_Sultani wikiPageWikiLink Zij.
- Zij-i_Sultani wikiPageWikiLink Zij-i_Ilkhani.
- Zij-i_Sultani wikiPageWikiLinkText "Zij-i Sultani".
- Zij-i_Sultani wikiPageUsesTemplate Template:Citation_needed.
- Zij-i_Sultani wikiPageUsesTemplate Template:Islamic_astronomy.
- Zij-i_Sultani wikiPageUsesTemplate Template:Italic_title.
- Zij-i_Sultani wikiPageUsesTemplate Template:Lang-fa.
- Zij-i_Sultani wikiPageUsesTemplate Template:Reflist.
- Zij-i_Sultani subject Category:1437_books.
- Zij-i_Sultani subject Category:Astrological_texts.
- Zij-i_Sultani subject Category:Astronomical_tables.
- Zij-i_Sultani subject Category:Astronomical_works_of_medieval_Islam.
- Zij-i_Sultani hypernym Table.
- Zij-i_Sultani type Book.
- Zij-i_Sultani type Work.
- Zij-i_Sultani type Book.
- Zij-i_Sultani type Object.
- Zij-i_Sultani type Table.
- Zij-i_Sultani type Work.
- Zij-i_Sultani comment "Zīj-i Sultānī (Persian: زیجِ سلطانی) is a Zij astronomical table and star catalogue that was published by Ulugh Beg in 1437. It was the joint product of the work of a group of Muslim astronomers working under the patronage of Ulugh Beg at Samarkand's Ulugh Beg Observatory.".
- Zij-i_Sultani label "Zij-i Sultani".
- Zij-i_Sultani sameAs Q202813.
- Zij-i_Sultani sameAs Zij-i-Sultani.
- Zij-i_Sultani sameAs Tables_sultaniennes.
- Zij-i_Sultani sameAs Zij-i_Sultani.
- Zij-i_Sultani sameAs m.0fgvw9.
- Zij-i_Sultani sameAs Гурганский_зидж.
- Zij-i_Sultani sameAs Ziji_jadidi_Koʻragoniy.
- Zij-i_Sultani sameAs Q202813.
- Zij-i_Sultani wasDerivedFrom Zij-i_Sultani?oldid=673010811.
- Zij-i_Sultani isPrimaryTopicOf Zij-i_Sultani.