CHARLOTTE, NC (WBTV) - I had a question once about the earth with respect to its spin, its tilt, and yes, its wobbling. Most people are familiar with the first two, but wobbling? Yes, the earth does indeed wobble.
Can you remember the last time you spun a top?
Sometimes, if you do it just right, the top can appear to be motionless, just sitting there spinning.
Most other times, especially when it slows, it starts wobbling.
Like that top, the earth wobbles too, but it only completes one wobble about every 26,000 years.
We call this precession.
So if we break the three down, the earth's spin gives us day and night. The earth's tilt contributes to our seasonal changes from summer to winter. When we (in the northern hemisphere) are tilted toward the sun, we receive stronger solar radiation and thus, a warmer climate. The opposite is true in the winter. But about all precession is good for is seeing the star field pattern shift, such as the north star no longer remaining the north star. But you'd have to be around at least a couple thousand years to easily notice that.