Which celestial bodies have a change in the moment of inertia recorded? What are the possible reasons for these changes?

When the solid crust of a neutron star is disrupted, a sharp change in the moment of inertia occurs, which results in jumps in the rotation periods. Abrupt changes in the Earth’s angular velocity are also explained by a change in the moment of inertia due to the movement of air and snow masses over the Earth’s surface.

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