“The Earth as a spinning top in Space”

"The Earth is warming" is now a well-established theory. The most popular cause is the greenhouse effect caused by CO2 carbon dioxide. The Earth has an atmosphere, and the greenhouse effect caused by that atmosphere is undeniable. I won't go into that issue here. Let's take a look at the dynamic changes of the Earth. The Earth's surface temperature is affected by the Sun. If the Earth does not revolve around the Sun, the Earth is a frigid hell. The greenhouse effect also assumes the existence of solar heat. It's a frigid hell outside, but inside the house, by the fireplace, it's warm. Is the distance from the fireplace close or far? Even on the same Earth, the climate fluctuates as the latitude rises from the equator to the polar regions.

As you know, the Earth revolves around the Sun (revolution) and at the same time the Earth itself rotates (rotation). When these images are shown on computer graphics, the illusion is that the orbit is always constant, but in reality, there are periodic "fluctuations" in the orbit, and the angle of the Earth's rotation axis is not always constant. Periodic "fluctuations" in orbit have brought about dynamic changes as ice ages that have occurred several times in Earth's history.  　The Earth's orbit is also a very interesting topic from the perspective of geophysics, but in fact, the angle of the Earth's rotation axis has a very large impact on climate change. There is a popular theory that "in years when summer is extremely hot, winter cold is severe", but this is thought to be due to the fact that the angle of the rotation axis is not constant every year. This is because subtle changes in the angle of the rotation axis increase and decrease the influence of solar heat, affecting the Earth.

 　　　”Earth's inner core may have started spinning other way: Study”/Earth

There is an article in the scientific journal "Earth" about the motion of the Earth's inner core. The Earth's inner core is thought to be in rotational motion as if it were floating in the outer core, but according to the article, it is possible that the Earth's inner core has stopped moving in the past few decades and changed its motion to reverse rotation. Geophysicists seem to have various theories about the motion of the Earth's inner core, but it is suggested that what they have in common is as follows

1) the Earth's inner core is moving,

2) its motion is not constant, and

3) its motion changes depending on a certain cycle.

The inner core is thought to be a mass of high heat in the center of the Earth, but it is not easy to observe it. However, when considering the motion of an object, the state of its central nucleus G is closely related to the state of motion of the object as a whole. In other words, the inner core is also the center of the Earth's rotation axis. Thus, the state of motion of the inner core also affects the rotation of the Earth. The angle of the rotation axis is always "fluctuating" within a certain range depending on the state of motion of the inner core. Now, let's pay attention to the "top spinning" at the beginning. The state of the rotating top seems constant at first, but as the rotation speed decreases, the "fluctuation" gradually becomes noticeable. Then, the "fluctuation" finally grows and the rotation stops. As a physical phenomenon of the motion of an object, it is a very natural motion. The Earth is also a "floating top in Space."