Rotating Events in Our Time

Most people are aware that the Earth revolves around the sun each day for 24 hours, but not all are aware that the Earth’s rotational speed varies slightly. A day may appear longer or shorter than you would expect. This is the reason why timekeeping atomic clocks which maintain standardized time must be regularly adjusted, adding or subtracting seconds. This change is called leap seconds. This article will describe what a leap second is and why it is important to our daily schedules.

One of the most common rotating events is precession, which is the oscillation of Earth’s axis, much as a slightly off-center spinning toy top. This shift in axial position relative to fixed stars (inertial spaces) has a period of 25,771.5. This is also the reason for the direction of cyclones both in the Northern Hemisphere as well as in the Southern Hemisphere. Other rotating events include the Chandler wobble free nutation, the Polar motion.

In addition to these regular events, the speed of the rotator can be affected by weather conditions and other elements like earthquakes. For example, if the core of the Earth rotates faster than the outer layer, a day will appear shorter. This is due to the tidal forces that are acting on surface of the Earth and gravitational pulls from other objects within the Solar System, such as Jupiter and Saturn. This is the reason the Earth’s rotating speed has to be considered when designing fun park rides like Ferris wheels and carousels.