Keliling Bumi
Keliling Bumi adalah ukuran jarak keliling Bumi, yang berukuran sekitar (40.075.017 km [ 24.901.461 mi ][1]) atau sekitaran kutub (4.000.786 km [ 2.485.973 mi ][2]).
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.[3] 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.
Daftar pustaka
Wikimedia Commons memiliki media mengenai Earth's circumference.
- Krebs, Robert E.; Krebs, Carolyn A. (2003). "Calculating the Earth's Circumference". Groundbreaking Scientific Experiments, Inventions, and Discoveries of the Ancient World. Greenwood Publishing Group. hlm. 52. ISBN 978-0-313-31342-4.
- Nicastro, Nicholas (25 November 2008). Circumference: Eratosthenes and the Ancient Quest to Measure the Globe. St. Martin's Press. ISBN 978-1-4299-5819-6.
- Gow, Mary (1 July 2009). Measuring the Earth: Eratosthenes and His Celestial Geometry. Enslow Publishing, LLC. ISBN 978-0-7660-3120-3.
- Lowrie, William (20 September 2007). Fundamentals of Geophysics. Cambridge University Press. ISBN 978-1-139-46595-3.
Referensi
- ^ World Geodetic System (WGS-84). Available online from National Geospatial-Intelligence Agency.
- ^ Humerfelt, Sigurd (26 October 2010). "How WGS 84 defines Earth". Diarsipkan dari versi asli tanggal 24 April 2011. Diakses tanggal 29 April 2011.
- ^ Ridpath, Ian (2001). The Illustrated Encyclopedia of the Universe. New York, NY: Watson-Guptill. hlm. 31. ISBN 978-0-8230-2512-1.