https://northcentralrotary.org/2019/11/16/rotating-events-in-our-time
Most people are aware that the Earth revolves around the sun each day for 24 hours, but they don’t realize that our planet’s rotational speed varies. This means that a day may sometimes seem longer or shorter than you would expect. The clocks that are atomic, which maintain standard time, need to be adjusted regularly by adding or subtracting a second. This is referred to as leap seconds. This article will explain what a leap second is and why it’s crucial to our daily routines.
Precession is a common rotating event. It is the cyclical wobble of Earth’s axis, similar to a toy top that rotates slightly off-center. This change in axial orientation relative to fixed stars (inertial spaces) has a period of 25,771.5. It’s also responsible for changing the direction of cyclones within the Northern and Southern Hemisphere. Other rotating events include the Chandler wobble free nutation, polar motion.
The speed of the rotator is affected by other factors, such as earthquakes, weather conditions, and other regular events. For instance, if core of the Earth rotates faster than its outer layer, the day will appear shorter. This is due to tide forces acting on the surface of the Earth, as well as gravitational pulls from other large objects in the Solar System, such as Jupiter and Saturn. This effect is why the Earth’s rotating speed has to be accounted for when designing fun park rides such as Ferris wheels and carousels.
