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。

youdao

What is the moment of inertia for rotation of a rod about this axis?

关于这个轴的,旋转动动量是多少？

youdao

The radius from the axis of rotation — - the axis of rotation is here — and the distance from here to here, though you may not think so, is about 15 meters.

半径是这个转动轴-，转动轴在这里-，距离从这里到这里，你们也许想不到，有15米。

youdao

Today motion sensing has progressed to being three-axes of acceleration, and three axis of rotation (technically called gyroscopes).

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Because Jupiter's axis of rotation does not quite line up with its magnetic axis, the moons that orbit the planet feel such a fluctuating magnetic force.

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Christoph Scheiner was one of the discoverers of sunspots and discovered the rotation of the sun on its axis.

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