In the vast universe, as big as galaxies, as small as the dust in the universe, they are all changing. Each star seems to have its own orbit. It’s as if it was set in advance. In addition, the motion of all celestial bodies in the universe is extremely regular. For example, the earth is in rotation every day. The rotation period of a week is 24 days, and each regression year is about 365 days, and it keeps rotating again and again.
The picture shows the rotation of the earth
Stellar day is the real period of the earth’s rotation
When we went to school, in geography class, the teacher had already told us that the earth moves around the earth’s axis, which is called “rotation”. The direction of the earth’s rotation is from west to East. So what is the period of the earth’s rotation? The period of the earth’s rotation refers to the time it takes for the earth to rotate one cycle. The earth’s rotation cycle is one day, that is, 24 hours. The earth’s rotation cycle is mainly divided into solar day and stellar day. What’s the difference between the two?
The so-called solar day refers to the sun as a reference, the time required for the earth to rotate for one cycle is called solar day, that is, 24 hours. If a star in the universe is taken as a reference, the time for the earth to rotate for one cycle is called stellar day, which is different from the solar day. The time for stellar day is 23 hours 56 minutes 4 seconds, which is slower than the solar day. Therefore, stellar day can be seen Is the real period of the earth’s rotation, and 23 hours 56 minutes 4 seconds is also the real time of the earth’s rotation.
The picture shows the earth and the sun
Why is the real time of the earth’s rotation nearly four minutes slower?
Some netizens can’t help asking: “why does the sun day have more time than the star day?” The main reason is that the earth is a sphere. If the sun is taken as a reference, the earth is still in revolution when it rotates for one cycle, and the rotation angle of the earth is greater than 360 degrees. The rotation speed is not only angular speed, but also linear speed. If the rotation is 360 degrees, the time of the sun day is 24 hours. Why is the earth’s real time nearly four minutes slower? It is understood that the earth’s revolution is an elliptical orbit, which does not require 3.56 seconds of compensation every time. It is just that there are so many even orbits. Sometimes the difference can be up to 16 minutes. But it doesn’t affect when you see the sun overhead, the pointer points to 12 o’clock. So if 23 hours 56 minutes 4 seconds is the real time of the earth’s rotation, is it eternal? The answer is not, although this time is very accurate, but it is not fixed, because the earth has been in constant change.
For example, when scientists discovered that the age of dinosaurs once appeared on the earth, according to relevant research, the rotation cycle of the earth at that time was only 23.5 hours, but the year at that time was 372 days. Therefore, in general, the time of the earth’s rotation is not fixed and will change more or less under the influence of atmospheric pressure, wind direction, crustal movement and other factors. For example, the speed of the high-speed railway is more than 350 kilometers per hour, which is not constant. For example, when it is affected by bad weather such as rain and wind, the speed of the high-speed railway will slow down. Similarly, the rotation time of the earth will change.
The picture is a simulation of the age of dinosaurs
The earth’s rotation is slowing down, but it will suddenly accelerate in 2020
For us, we can’t feel the change of the earth’s rotation cycle. We only know that the sun rises in the East and sets in the west every day, and the day and night are changing alternately. Since the birth of the earth, its rotation speed along the orbit is very fast. How fast is it?
It only takes 20 minutes for the rotation speed of a circle. As the solar system gradually stabilizes, the number of asteroid impacts decreases, and the rotation speed of the earth slows down a lot. When the moon appeared, there was a gravitational tide between it and the earth. Under the influence of the moon’s gravity, the speed of the earth’s rotation kept slowing down. With the passage of time, the real cycle time of the earth’s rotation was 23 hours 56 minutes 4 seconds.
The picture shows the earth and the moon
Under the influence of the moon’s gravity on the earth, the earth’s rotation speed is still slowing down every day. However, it is worth mentioning that since the year 2020, the earth’s rotation speed has suddenly increased, and the average rotation time is less than 24 hours. Especially on July 19, 2020, scientists found that the earth’s rotation cycle on this day is 1.4602 milliseconds shorter than 24 hours. Why does the earth’s rotation speed suddenly increase?
Previously, we mentioned to you that the real time of the earth’s rotation is not immutable. Under the influence of the gravity of the moon, the speed of the earth’s rotation will slow down. Now in 2020, the speed of the earth’s rotation will suddenly accelerate. Some netizens speculate that the acceleration of the earth’s rotation may be related to the frequency of asteroids hitting the earth.
For example, on December 23, 2020, a meteor occurred in Yushu, Qinghai Province; on March 28, 2020, a meteorite hit southwest Nigeria; on July 2, 2020, a meteorite fell down in xizhiye, Chiba Prefecture, Japan; and in the middle of 2020, two meteor events occurred in Kanto, Japan in two months Due to the impact of the asteroid, the rotation speed of the earth is accelerated.
Before that, in the age of dinosaurs, the speed of the earth’s rotation was also accelerated. Its rotation cycle was only 23 hours. In the coming decades, due to the change of crustal movement, the influence of the ocean and the atmosphere, the speed of the earth’s rotation will fluctuate. For example, skaters always habitually choose to open their arms and rotate, and then fold up their arms. This speed will increase with the change of radius. The earth’s rotation speed is affected by external forces. The closer it is to the earth’s center, the faster it rotates.
The picture shows a Qinghai meteor illuminating the night sky
What is the impact of the sudden acceleration of the earth’s rotation on us?
Devastating disaster: losing the “safety belt”, accelerating the global economy and heading for extinction
If the speed of the earth’s rotation continues to accelerate, what kind of impact will it have on us?
Just imagine, we live in the blue earth, just like we are sitting in a car. When the car changes from normal speed to sudden acceleration, we will habitually feel uneasy and nervous. Moreover, due to the influence of inertia, the car can not bear the extreme high speed, and then it will be destroyed.
Similarly, when the earth’s rotation speed accelerates, all creatures and objects on the earth will be impacted by inertia, and human beings living on the earth may be doomed. Unless human beings find an extremely safe open space and tie it with a “safety belt”, it can maintain relative stability, but this stability is also temporary. Once the “safety belt” breaks, after all objects run at high speed from the air, they are likely to collide with it and eventually die.
As the change of day and night speeds up, so does the human metabolism
If the speed of the earth’s rotation continues to accelerate, it means that the alternation of day and night will also speed up. For example, the work and rest time of our human biological clock is eight hours. With the acceleration of the alternation of day and night, the work and rest time of our biological clock will be simple, maybe from the previous eight hours to five hours. Once we don’t have enough work and rest time, the new life in our body will change Chen metabolism will accelerate.
An orderly change in the synthesis and decomposition of organisms, the alternation between the old and the new, forms our metabolism. Accelerated metabolism means that our body has been in a state of indigestion. If metabolism is an engine, then liver operation is a processing plant. The greater the power of the engine, the faster the speed, the faster the liver processing speed will be, and even there will be overload work. The formation of liver cancer is caused by accelerated metabolism, tumor If the cells are over digested, there will be a large-scale spread and the speed of death will be accelerated. In addition, the body’s thyroid will also accelerate metabolism, excessive secretion of hormones, which is very harmful to human beings.
The picture shows the liver cancer cells under the microscope
3. The faster the rotation speed, the greater the centrifugal force, part of the human lost their homes
The faster the earth’s rotation speed, the greater the centrifugal force, and the more energy it generates. The sea near the equator will increase and even submerge all the land near the equator. For example, the Sao Tome and Principe near the equator, Gabon and the Republic of Congo (Congo cloth) will all be submerged by the sea, and the hemispheres will be completely separated from the earth’s climate. There will also be great changes. Fires, earthquakes and other natural disasters will continue to occur frequently. In particular, Huangshi mountain volcano in the United States has hidden underground lava banks, which has become the biggest threat to today’s world of human civilization. Once a sudden explosion occurs one day in the future, the consequences may be global, not just the United States. Of course, the United States will be most affected. Huge magma and smoke clouds will surge out. Most parts of the United States will be shrouded in a dark world, and volcanic ash will cover every corner. This is a devastating disaster for the earth. At that time, the earth will no longer be a planet with four distinct seasons, and human beings will fall into a survival crisis, with a large number of plants and animals dying If we die, the earth will become an uninhabitable planet.
The picture shows the stills of 2012
But generally speaking, the gradual slowing down of the earth’s rotation is a normal natural phenomenon. Since the day when we were born, the earth has been in a process of gradual slowing down. In this process of gradual slowing down, it is a normal natural phenomenon that the earth suddenly accelerates slightly due to some slight changes. For example, this kind of phenomenon occurred on July 19, 2005, so it is not as serious as the above. Except that one day the earth suddenly loses control and begins to rotate rapidly, that day seems very far away .
How can the earth’s rotation speed be stabilized? Perhaps with the continuous development of science and technology, scientists will develop a special gravity device in the earth’s orbit to balance the gravity of the earth and the moon and keep it in a stable state. In addition, they will develop a protective film to prevent the impact of planets on the earth. Only in this way can the earth’s rotation be stable and the ecology be stable without the interference of external forces Mass extinctions will not happen again.