The main component of polar motion is the so-called Chandler wobble. Although it was already ... of the oceans around the solid parts of the Earth, its rotational inertia varies slightly with ...

The inner, solid part of Earth's core behaves like a spinning top; it rotates around its axis along with the entire environment and makes cyclical movements. This occurs with regularity every 8.5 ...

In general, the larger the wobble, the greater the mass of ... million km/186 million miles — i.e. twice the Earth–sun distance) from its star to as close as 0.75 AU (112 million km/69.7 ...