What is the force that causes the earth to rotate without stopping?

The speed of the Earth's rotation is mainly influenced by three factors, which generally slow it down. Long-term variability: The gravitational force of the sun and moon on the oceans slows down the Earth's rotation, increasing the length of the Earth's day by milliseconds every 100 years, resulting in a decrease in the number of days in a year, with evidence suggesting that a year in the mid-Devonian period was 400 days.

Seasonal changes: There are annual changes and semi-annual changes. The annual variation is caused by the seasonal variation of the wind, the amplitude of which is 20-25 milliseconds; The semi-annual variation is caused by the tidal action of the tidal force of the sun and moon on the atmosphere, and its amplitude is about 9 milliseconds.

Irregular change: The exchange of matter or energy between extraterrestrial and intraterrestrial, such as the impact of meteorites on the Earth, sometimes accelerates the Earth and sometimes slows it down.

The Earth's rotation is related to the formation of the solar system and angular momentum.

The formation of the solar system.

Astronomers believe that the solar system was formed by ancient primordial nebulae. The primordial nebula is a very thin cloud of gas, which is affected by some kind of perturbation and gravitational attraction that shrinks toward the center. After a long period of evolution, the temperature and density of the central part of the matter became higher and higher, and finally it reached a point where it could trigger a thermonuclear reaction, thus evolving into the sun.

The residual gas around the sun slowly formed a rotating disk-shaped gas layer, which condensed into solid particles, microplanets, and primordial planets in the gas layer through complex processes such as contraction and collision, and finally formed a complete solar system celestial body.

The angular momentum that is assigned.

The original nebula originally had angular momentum, and after the formation of the solar system, its angular momentum was still not lost, but it has been redistributed, and each star has obtained its own angular momentum from the primitive nebula in the long process of evolution. Since angular momentum is conserved, planets will rotate faster and faster as they contract, and Earth is no exception. The angular momentum gained by the Earth is mainly distributed in three aspects: the revolution around the Sun, the mutual rotation of the Earth-Moon system, and the rotation of the Earth.

Unconstant rotational speed.

In real life, it is easy to think that the earth moves at a uniform speed, otherwise the length of the earth will change every day. But in reality, the speed of the Earth is also changing. In the Late Ordovician period, hundreds of millions of years ago, the earth revolutionized 412 days; In the Middle Silurian period 100 million years ago, there were only 400 days per year; By the Middle Devonian period 100 million years ago, the year was 398 days; By the Late Carboniferous, 100 million years ago, there were about 385 days per year; In the Cretaceous period, 65 million years ago, the year was 376 days, and now the year is days.

Astrophysical calculations prove that the Earth's rotation is slowing down. Scientists believe that the reason for this phenomenon is the result of the tidal action of the Moon on the Earth.

The stone realm is material, matter is moving, motion is curved, and since it is curved, it will rotate.

The rotation of the earth does not require any external force, and there is a rotation when the earth is formed, because there is a huge moment of inertia, which has not stopped so far.

The earth didn't want to move at first, and everyone asked why the earth didn't rotate, but the earth thought to himself that it would be idle anyway.

The earth is always rotating, what is the force that supports the earth's continuous rotation? We all know that the earth rotates, so every day there are minutes of day and night, and the earth rotates once every 24 hours (actually 23 hours, 56 minutes and 4 seconds). The Earth has been rotating since its formation, and the Earth rotated faster in the early days.

Scientists believe that when the Earth was first formed, the speed of rotation was only 4 8 hours a day. The Earth has been formed for about 4.6 billion years and has been rotating like a perpetual motion machine for billions of years. So, what forces are pushing it to continue to spin, and why hasn't it stopped for billions of years?

In fact, this force still comes from the formative period of the earth. Friends who know astronomy know that the earth and other celestial bodies in the solar system were formed in the primordial solar stars. When the material that formed the earth begins to condense, it always has a tendency to start moving.

And the most rudimentary celestial body, the asteroid 3354, was formed, which rotated in the early hours of the morning. It seems that the asteroids in the universe are also spinning now.

When the early Earth was first formed, it had its own gravity, no matter how big it was. Its gravity can only cause gravitational disturbance to the surrounding small celestial bodies. Let the small celestial bodies close to it collide together, and in the process of collision, these small celestial bodies in turn give the earth the power of rotation, although there may be opposing forces, but in the general trend of the primitive earth, the forces of these shocks have mostly contributed to the power of the primitive earth.

In addition, a large number of gas molecules in the universe absorbed during the formation of the Earth's atmosphere can also promote the Earth's rotation to a certain extent, and the reason why Jupiter and Saturn rotate faster than the Earth is that gravity accelerates the influence of hydrogen molecules on the atmosphere.

However, the Earth's current state of rotation, rotation speed, and Earth's axis vibrations have also been formed, which have a lot to do with the collision of some celestial bodies for billions of years. For example, the collision of an asteroid that exterminated the dinosaurs could change the Earth's rotation speed and the vibration state of the Earth's axis to a certain extent. It's just a celestial body of that grade, but it's too small compared to the Earth and doesn't have much effect on the Earth's rotation state, but billions of Earths have been rotating because there is no resistance in the universe to stop the rotation.

Just like when we hit a spinning top, when the gyro rotates, it is affected by the friction with the ground, and the speed becomes slower and slower. At this time, the rotation can only continue to be carried out by continuing to pump with a whip, but the earth will not be subjected to any resistance such as friction when it rotates in the universe, therefore, its rotation speed will also slow down and will not stop, and the earth's oceans are affected by the tides caused by the gravity of the moon, so the earth's rotation speed will slow down until the earth and the moon form a tide. At that time, the time of the day of the earth will be a month.

And the earth and the sun also have tidal phenomena. If submerged by the sun's tides, the earth's day will last for a year.

The power of the Earth's rotation comes from the angular momentum of the clouds of gas and dust that originally formed the Earth. The driving force for the rotation of the earth is an internal force rather than an external force.

Because the earth and other planets generate gravity, and the earth itself has a magnetic field, it can support the continuous rotation of the earth.

In fact, it is the effect of gravity. We are always under the influence of the sun, and when we revolve around the sun, our angle will also shift.

Not only the earth is rotating, in fact, the large and small celestial bodies in the universe are rotating, but there is a difference between whether there is a law or not, and even stars like the sun are rotating. They do not need propulsion in the process of rotation, because it is a vacuum environment, once there is a force at the beginning, then it will continue to move, the key is that the first propulsion force is the first to come.

If you want to trace back to **, you can continue to trace back to the beginning of the universe hundreds of millions of years ago**, because everything in the universe today comes from there, whether it is matter or energy. If you look at the solar system alone, it can be traced back to 5 billion years ago, the early solar system was just a molecular cloud, due to some kind of external disturbance, such as the shock wave of a supernova burst from a certain direction, which caused the molecular cloud to intensify its motion and cause gravitational contraction, as the mass rises higher and higher, the temperature becomes higher and higher, and the sun is formed.

Since the early molecular clouds were also moving, the sun inherited the original angular momentum, and the planets and small celestial bodies that were formed later had the angular momentum of the original nebula, and the angular momentum was conserved, that is, if a rotating material body was not affected by the external moment, or the net force was equal to 0, then the angular momentum originally carried by the material body would not change due to the change in the shape of the material body. At the beginning, the center of the solar system, this celestial body, under the impact of a certain energy, produced a thermonuclear reaction, this star was born, born in the **, in which a few tenths of a percent of the matter was pushed away from the center by the ** force in the form of cosmic dust Egyptian gaseous state, these substances in the form of a swirling mass in the universe (within the gravitational force of the sun) experienced a long time of absorption, combination, and convergence when the sun rotated and turned the earth, and the earth rotated when it drove itself, and the motion energy was ** in the sun's revolution! By analogy, the celestial bodies and galaxies in the universe are interlocking and cascading, and energy transmission and movement are nothing more than that.

The ultimate power is in the cyclic evolution process of cosmic galaxies!

The celestial bodies formed in the molecular nebula, whether it is the Moon, the Earth, or other celestial bodies, are rotating, and they all inherit the angular momentum of the original solar nebula. Therefore, the earth will rotate, and due to the vacuum environment, the loss is simply none, and it will continue to rotate, but it will gradually slow down the rotation rate due to the "brake" effect of the moon.

The force of the Earth's rotation comes from the dust of the Earth's formation, which creates angular momentum when it condenses, causing the Earth to rotate slowly.

I believe that the power of the Earth's rotation comes from the Earth's core in the middle of the Earth, which constantly emits energy outward to make the Earth rotate.

The Earth is a planet in the solar system, and the Earth is in constant motion and orbits around itself. This is called revolution. Motion around the center of the earth is called rotation. The power of rotation is also provided by itself.

The creation of the Earth's rotation and revolution is closely related to the formation of the solar system.

Modern astronomical theories suggest that the solar system was formed by the so-called primordial nebula, a very thin cloud of gas that contracted to the center under the influence of some kind of perturbation 5 billion years ago. After a long period of evolution, the density of the matter in the central part became higher and higher, and finally it reached the point where it could trigger a thermonuclear reaction, and it evolved into the sun.

The residual gas around the sun gradually forms a rotating disk-like gas layer, which gradually gathers into solid particles, microplanets, and primordial planets in the gas layer through the processes of contraction, collision, capture, and accumulation, and finally forms independent solar system objects such as large planets and asteroids.

We know that to measure the speed of a straight-moving object, it can be expressed in terms of velocity, so what is the measurement of the rotation of the object? One way to do this is to use "angular momentum".

For an object revolving around a fixed point, its angular momentum is equal to the mass multiplied by the velocity, multiplied by the distance of the object from the fixed point. There is a very important law of conservation of angular momentum in physics, which is to say, a rotating body.

If it is not acted upon by an external moment, its angular momentum does not change due to the change in the shape of the object. For example, a ballet dancer, when he suddenly folds his arms in the middle of rotation (the distance between the center of mass and the fixed point becomes smaller), his rotation speed increases, because only in this way can the angular momentum be maintained. This law plays an important role in the generation of the Earth's rotation speed.

The primordial nebulae that formed the solar system originally had angular momentum, and after the formation of the solar and planetary systems, its angular momentum would not be lost, but it would inevitably be redistributed, and each star would get a certain amount of angular momentum from the primordial nebula in the long process of accumulating matter. Since angular momentum is conserved, the planets will also rotate faster and faster during contraction.

The earth is no exception, the angular momentum it obtains is mainly distributed in the rotation of the earth around the sun, the mutual rotation of the earth-moon system and the rotation of the earth, which is the origin of the earth's rotation, but to really analyze the orbital motion and rotation motion of the earth and other major planets still requires scientists to do a lot of research work.

That is to say, in the formation of the Earth, motion, especially rotation, accompanied the formation of the Earth from beginning to end, rather than the beginning of its rotation or revolution for some reason after the formation of the Earth.