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Conventional International Origin : ウィキペディア英語版 | Conventional International Origin Conventional International Origin (CIO) is a conventionally defined reference axis of the pole's average location over the year 1900. Polar motion is the movement of Earth's rotation axis across its surface. The axis of the Earth's rotation tends, as the axis of a gyroscope, to maintain its orientation to inertial space. The Conventional International Origin is used to measure this movement. ==References==
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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Conventional International Origin」の詳細全文を読む
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