Question: can the earths rotation be sped up or slowed down?

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  1. Ahh… @Kyler would have loved this one! 🙂 I’ll do my best #thisonesforKyler

    The Earth’s rotation is extremely constant, but there is a VERY SLOW trend to the rotation of the Earth getting the tiniest bit slower (due to gravitational interaction with the moon). But it doesn’t speed up. Major earthquakes can cause fractional changes in the Earth’s rotational rate, but again, these are quite tiny.

    Atomic clocks show that a modern day is longer by about 1.7 milliseconds than 100 years ago.


  2. Yes, but not without significant changes to either the size of Earth, or things close to Earth.

    The most obvious way that comes to mind involves moving the moon closer or further away from earth. Think of earth and the moon as an iceskater with his arms out. He spins at one speed with his arms out, but when he brings his arms in towards him he speeds up, and then can slow down putting his arms out again!

    You could also try building a huge steel pole a few kms high and attaching as many rockets as you can find. The power of the rockets would have a TINY impact on the speed, but it would be awesome to watch 😉