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地理极点

地理极点行星卫星或其它较大天体的自转轴与其表面交会的点。如在地球上的北极南极,其它天体的极也称为南极和北极,分别会在该天体赤道两侧各90之处[1]。每一颗行星都有地理极点[2]。天体自转的摄动意味着地理极点会在它的表面上稍稍的徘回。例如,地球的北极和南极在数年的时间内会有几米的移动[3][4][5]。当制图需要精确和不变的座标[来源请求],地理极点的平均位置作为固定的制图杆,成为物体大圆经度的交会点。如果,像地球,一个天体产生磁场,就会有磁极[6]

误区

很多人都认为,地理的两极与磁场的两极是一回事,实则不然。

相关条目

参见

参考资料

  1. ^ Kotlyakov, Vladimir; Komarova, Anna. Elsevier's Dictionary of Geography: in English, Russian, French, Spanish and German. Elsevier. 2006-12-20: 557 [2015-10-23]. ISBN 978-0-08-048878-3. (原始内容存档于2022-11-07) (英语). 
  2. ^ Hooper, William George. Aether and Gravitation. Medprintor. 2008: 224 [2015-10-23]. ISBN 978-1-4505-8550-7. (原始内容存档于2022-11-07) (英语). 
  3. ^ Schar, Ray. Wonderfully Weird World. Xlibris Corporation. 2010-08-30: 106 [2015-10-23]. ISBN 978-1-4535-3948-4. (原始内容存档于2022-11-10) (英语). 
  4. ^ Lovett, Richard A. Climate Change Has Shifted the Locations of Earth's North and South Poles. Scientific American. 2013-05-14 [2015-06-26]. (原始内容存档于2017-11-19). 
  5. ^ Archinal, B. A.; A’Hearn, M. F.; Bowell, E.; Conrad, A.; Consolmagno, G. J.; Courtin, R.; Fukushima, T.; Hestroffer, D.; Hilton, J. L.; Krasinsky, G. A.; Neumann, G. Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009. Celestial Mechanics and Dynamical Astronomy. 2011-02, 109 (2). Bibcode:2011CeMDA.109..101A. ISSN 0923-2958. S2CID 189842666. doi:10.1007/s10569-010-9320-4 (英语). 
  6. ^ 20 Things You Didn't Know About... the North Pole. Discover Magazine. 2014-11-18 [2015-06-26]. (原始内容存档于2015-06-26). 
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地理极点
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