Remarks about External Forces Acting on Earth’s Rotation Axis

作     者：Monica Zoe Ciobanu Monica Zoe Ciobanu

作者机构：Astronomical Institute of the Romanian Academy Bucharest Romania 

出 版 物：《World Journal of Mechanics》 (力学国际期刊（英文）)

年 卷 期：2023年第13卷第2期

页      面：73-77页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Nutation Variation in Intensity of Earth’s Rotation Axis Chandler’s Wobble 

摘      要：It is well known that a variation in the direction of Earth’s rotation axis is a real astronomical phenomenon, named nutation. It is interesting if a variation of this axis can take place only in intensity, in the simplest theoretical case of only two rigid body dynamics. This paper presents two positions of the Moon during its monthly orbit, where a sudden variation of Earth’s rotation axis in intensity can take place. The duration of this phenomenon is limited in time, maybe an instant or a day, and then a vortex can appear.