Keliling Bumi: Perbedaan antara revisi

'''Keliling Bumi''' adalah [[keliling|ukuran jarak keliling Bumi]], yang berukuran sekitar ({{convert|40075.017|km|mi|abbr=on|disp=x}}<ref>[[World Geodetic System]] (''WGS-84''). [http://earth-info.nga.mil/GandG/wgs84/ Available online] from [[National Geospatial-Intelligence Agency]].</ref>) atau keliling [[meridional|kutub]] ({{convert|40007.86|km|mi|abbr=on|disp=x}}<ref>{{cite web |first1=Sigurd |last1=Humerfelt |date=26 October 2010 |title=How WGS 84 defines Earth |url=http://home.online.no/~sigurdhu/WGS84_Eng.html |accessdate=29 April 2011 |deadurl=yes |archiveurl=https://web.archive.org/web/20110424104419/http://home.online.no/~sigurdhu/WGS84_Eng.html |archivedate=24 April 2011 |df=}}</ref>).

 

Ukuran keliling Bumi telah mempengaruhi [[navigasi]] sejak zaman kuno. Keliling Bumi mula-mula dihitung oleh [[Eratosthenes]], yang ia lakukan dengan membandingkan ketinggian matahari tengah hari di dua tempat untuk mengetahui jarak utara-selatan.<ref>{{cite book|title=The Illustrated Encyclopedia of the Universe|last=Ridpath|first=Ian|publisher=Watson-Guptill|year=2001|isbn=978-0-8230-2512-1|location=New York, NY|page=31}}</ref> In the Middle Ages, [[Al Biruni]] calculated a more accurate version, becoming the first person to perform the calculation based on data from a single location.

 

{{Commons category|Earth's circumference}}

* {{cite book|last1=Krebs|first1=Robert E.|last2=Krebs|first2=Carolyn A.|title=Groundbreaking Scientific Experiments, Inventions, and Discoveries of the Ancient World|chapter-url=https://books.google.com/books?id=0H0fjBeseVEC&pg=PA52|year=2003|publisher=Greenwood Publishing Group|isbn=978-0-313-31342-4|p=52|chapter=Calculating the Earth's Circumference}}

* {{cite book|last=Lowrie|first=William|title=Fundamentals of Geophysics|url=https://books.google.com/books?id=h2-NjUg4RtEC&pg=PA43|date=20 September 2007|publisher=Cambridge University Press|isbn=978-1-139-46595-3}}

 

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