Precession, basically is the change in the direction of earth's axis of rotation.
岁差，基本上是地球自转轴方向的改变。
Let's say we do rotation about the X-axis.
也就是绕x轴旋转。
The axis of rotation and its support are part of the central pedestal.
旋转轴和它的支撑结构是中央操作台的一部分。
The axis of rotation and its support are part of the central pedestal.
旋转轴和它的支撑结构是中央操作台的一部分。
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