"You might think that the width of the equator is zero, which it is at any given instant. Averaged over time, however, it is about 9 metres because that is the variation of the ‘Chandler wobble’, which is a slight oscillation in the Earth’s spin axis. This is thought to be mainly caused by differential seasonal air pressures which piles the ocean up in different parts of the planet on a seasonal basis. It is possible that some of the Chandler wobble could be caused by slight differential rotation between the Earth’s core and mantle. Plate tectonics may also have a contributory effect."
I Go to sleep now, and expect a Block when I wake up. IN MY NAME!!! Oh that would be so funny if I found a block...... Crossing fingers....
I saw that definition with a Google search when you first posted it but what was the "Hint: Friends" all about?
The pool is at 102PHs so far and looking good!