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- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī abstract "Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī (Arabic: خالد بن عبدالملك) was a Zanji slave who was taken to Persia in the 9th century.Together with ʿAlī ibn ʿĪsā al-Asṭurlābī in 827, he measured at 35 degrees north latitude, in the valley of the Tigris, the length of a meridian arc and thus the Earth's circumference, getting a result of 40,248 km (or, according to other sources, 41,436 km). The two researchers measured in Arabian ell, and determined the geographical latitudes of the end points they used from the star altitudes in a celestial horizontal coordinate system. We believe that 1 Arabian ell was 49 1/3 cm. Thus, they found the length of 1° of meridian to be 111.8 km (115.1 km), which differs from the actual value by 850 metres.".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageExternalLink Marwarrudhi_BEA.htm.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageExternalLink Marwarrudhi_BEA.pdf.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageID "86820".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageLength "1614".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageOutDegree "15".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageRevisionID "660963616".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink 35th_parallel_north.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Ali_ibn_Isa_al-Asturlabi.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Altitude.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Category:9th-century_astronomers.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Category:Astronomers_of_medieval_Islam.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Category:Geodesists.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Category:Medieval_Persian_astronomers.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Circumference.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Earth.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Ell.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Horizontal_coordinate_system.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Latitude.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Length.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Meridian_arc.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLink Tigris.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageWikiLinkText "Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Astronomer-stub.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Citation_needed.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Cite_encyclopedia.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Iran-scientist-stub.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Islamic_astronomy.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wikiPageUsesTemplate Template:Lang-ar.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī subject Category:9th-century_astronomers.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī subject Category:Astronomers_of_medieval_Islam.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī subject Category:Geodesists.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī subject Category:Medieval_Persian_astronomers.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī hypernym Slave.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Person.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Scientist.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Diacritic.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Geodesist.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Redirect.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī type Scientist.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī comment "Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī (Arabic: خالد بن عبدالملك) was a Zanji slave who was taken to Persia in the 9th century.Together with ʿAlī ibn ʿĪsā al-Asṭurlābī in 827, he measured at 35 degrees north latitude, in the valley of the Tigris, the length of a meridian arc and thus the Earth's circumference, getting a result of 40,248 km (or, according to other sources, 41,436 km).".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī label "Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī".
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Q2796360.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Khālid_ibn_ʿAbd_al-Malik_al-Marwarrūdhī.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Khalid_ibn_Abd_al-Malik_al-Marwarrūdhī.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs m.0lxp7.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Аль-Марварруди.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Halid_ibn_Abdul-Malek.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Kalid_Ben_Abdulmelik.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī sameAs Q2796360.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī wasDerivedFrom Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī?oldid=660963616.
- Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī isPrimaryTopicOf Khālid_ibn_ʿAbd_al‐Malik_al‐Marwarrūdhī.