地理極點

(由兩極跳轉過來)

地理極點行星衛星或其它較大天體嘅自轉軸同佢表面交會嘅點。例如地球上嘅北極南極,其它天體嘅極亦稱為南極同北極,分別會喺個天體赤道兩側各90之處。[1]每個行星都有地理極點。[2]

天體自轉嘅攝動意味地理極點會喺佢表面上稍為徘迴。例如,地球嘅南北極喺幾年內會郁幾米。[3][4]製圖需要精確同不變嘅座標,[未記出處或冇根據]地理極點嘅平均位置作為固定嘅製圖桿,成為物體大圓經度嘅交會點。

如果,好似地球,一個天體產生磁場,就會有磁極[5]

參考

  1. Kotlyakov, Vladimir; Komarova, Anna (2006). Elsevier's Dictionary of Geography: in English, Russian, French, Spanish and German. p. 557. 喺22 June 2015搵到.
  2. Hooper, William (2008). Aether and Gravitation. p. 224. 喺22 June 2015搵到.
  3. Schar, Ray (2010). Wonderfully Weird World. p. 106. 喺22 June 2015搵到.
  4. Lovett, Richard A. (2013-05-14). "Climate Change Has Shifted the Locations of Earth's North and South Poles". Scientificamerican.com. 喺2015-06-26搵到.
  5. "20 Things You Didn't Know About... the North Pole". DiscoverMagazine.com. 2014-11-18. 喺2015-06-26搵到.

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