I think the Earth is immobile, so why does the Earth move around the Sun?

In fact, strictly speaking, the Earth does not revolve around the Sun, but around the center of mass of the system that the Earth and the Sun make up (if the influence of other celestial bodies is not taken into account). This is because the effect of gravity is concentrated in this point, which means that the earth seems to be attracted to this one point. After studying high school physics, I know that in this case, as long as the initial velocity is not towards this center of mass (the earth is obviously not moving towards this center, the lucky one) will make a uniform circular or elliptical motion, in fact, the real circular motion does not exist, because there is resistance, its speed will continue to decrease, of course, this decrease is very small on the earth, otherwise we would have been baked.

Since the mass of the Sun is much greater than that of the Earth, the center of mass mentioned above can almost be considered to be in the center of the Sun. So there's nothing wrong with the Earth revolving around the sun.

As for why it moved like this in the first place, it is estimated that we have to start with the origin of the universe.

Given that this is currently inconclusive, do not consider that far.

To speak now, there is a gravitational pull between the earth and the sun.

And the magnitude of this gravitational force can satisfy the elliptical motion of the earth around the sun.

and not to do pericentric or eccentric movements.

You're on Earth, so your feelings are right. The earth is immovable relative to people.

The Sun is the closest star to Earth and is the central body of the solar system. The mass of the solar system is concentrated in the sun, and its strong gravitational pull controls the movement of celestial bodies such as large and small planets and comets.

It has given birth to the civilization of the earth and has always influenced the life of the earth. It is the only star whose surface structure can be studied in detail and is a huge astrophysics laboratory.

But the Sun is just an ordinary member of the 100 billion stars in the Milky Way, located near the symmetry plane of the Milky Way, about 33,000 light-years from the center of the Milky Way and about 26 light-years north of the galactic plane, on the one hand, it rotates around the galactic center at a speed of 250 kilometers per second, and on the other hand, it moves towards Vega at a speed of kilometers per second relative to the surrounding stars.

Extended Materials. The evolution of the sun.

The Sun was formed about 100 million years ago in a cloud of collapsed hydrogen molecules. The time of the Sun's formation is measured in two ways: the Sun's current age in the main sequence zone, confirmed using computer models of stellar evolution and primordial nucleosynthesis, which is about 100 million years old.

This is very consistent with the radioactive dating of the oldest material of the sun is 100 million years old. The Sun has reached middle age in the evolutionary phase of its main sequence, in which nuclear fusion is the fusion of hydrogen into helium at the core.

More than 4 million tons of matter are converted into energy in the Sun's core every second, producing neutrinos and solar radiation. At this rate, the Sun has so far converted about 100 Earth-masses of matter into energy, and the total time spent by the Sun in the main sequence is about 10 billion years.

The universe not only produces countless nebulae, but also produces n-level sub-nebulae downward, and makes nebulae and many n-level sub-nebulae produce moments. The Milky Way is a sub-nebula with a diameter of 100,000 light-years among the many sub-nebulae of the N-class, and the solar nebula of the next level is only one light-year in diameter. The Earth Nebula, which is also one level lower, has to be at the mercy of the sun.

As mentioned earlier, nebulae all produce moments, and when the moment is greater than the inertia, for example, the solar moment is greater than the solar inertia, and the sun will rotate. The centrifugal force generated by rotation increases with altitude, and the centrifugal force becomes larger and larger, but the gravitational force becomes smaller and smaller, so that when it reaches a certain altitude, it will form a planetary orbit. The earth also rotates because of the moment, so the earth moves in the orbit of the sun planet.

The Earth's revolution around the Sun refers to the periodic rotation of the Earth around the Sun.

The orbit is an ellipse that is very close to a perfect circle, with an average angular velocity of 360 degrees per year and a flat velocity of 940000000 kilometers per year.

1. The centripetal force provided by gravity, the sun has 99.9% of the mass of the solar system, so that there is always a huge force between the earth and the sun, so that the earth does not deviate from the control orbit of the sun;

2. The tangent direction of the earth's orbit has an initial angular momentum, which is possessed at the moment of the formation of the earth, and the magnitude is related to its energy.

The earth revolves around the sunBecause of the gravitational pull of the sun on the earth.

The Sun is the center of the solar system and its mass is very large, so its gravitational pull on the Earth is very strong. The Earth's orbit around the Sun is elliptical, which is caused by the Sun's gravitational pull on the Earth and the Earth's rotation.

The Earth revolves around the Sun very fast, about 30 kilometers per second. This speed is enough for the Earth to make one revolution around the sun in a year. The Earth's orbit around the Sun is elliptical, which means that the distance from the Earth to the Sun changes over time.

When the Earth is closest to the Sun, we call it perihelion, and when the Earth is farthest from the Sun, we call it aphelion.

The Earth's orbit around the Sun is described by the law of gravitation. This law was proposed by the English physicist Isaac Newton in the 17th century. According to this law, the gravitational force between two objects is inversely proportional to the square of their mass and distance.

Thus, the gravitational pull of the sun on the earth is inversely proportional to the square of the distance between them. The gravitational pull of the Sun on the Earth is strongest when the Earth is closest to the Sun, and the gravitational pull of the Sun on the Earth is weakest when the Earth is farthest from the Sun.

In short, the Earth's revolving around the Sun is due to the Sun's gravitational pull on the Earth. The Earth's orbit around the Sun is elliptical, which is caused by the Sun's gravitational pull on the Earth and the Earth's rotation. The Earth revolves around the Sun very fast, about 30 kilometers per second.

This motion is described by the law of gravitation, which was proposed by Newton in the 17th century.

That's right, the moon revolves around the earth, and the earth revolves around the sun. The Moon revolves around the Earth because the mass of the Earth is much greater than that of the Moon, and the distance from the Moon to the Earth places the Moon within the gravitational range of the Earth.

Although the Sun is massive, the Sun's gravitational pull on it is much smaller than that of the Earth because the Moon is too far away from the Sun and has too little mass. The Moon rotates while revolving around the Earth, and the period day is exactly a sidereal month, so we can't see the far side of the Moon. This phenomenon is called "synchronous rotation", or "tide locking", and is almost a universal law in the world of solar system satellites.

The Earth revolves around the Sun**

The mass of the Sun is much greater than that of the Earth (about 330,000 times that of the Earth), and the Sun-Earth distance puts the Earth within the gravitational range of the Sun (the distance is not too close and not too far, too close the Earth will crash into the Sun, too far away it will leave the solar system).

The basic way in which the celestial bodies of the universe move between each other follows Newton's law of universal gravitation. Objects with small masses are attracted by objects with large masses, and the distance between the two determines whether the small objects are within the gravitational range of the larger bodies.

When the distance is appropriate (too close, the small celestial body will collide with the large celestial body, too far away, the small celestial body will fly away from the large celestial body), the small celestial body will make elliptical motion around the large celestial body, and the centrifugal force and attraction generated by the elliptical motion reach dynamic equilibrium.

The earth is constantly rotating, and it is constantly revolving. The Earth's rotation is about 460 meters per second at the equator, and the Earth's linear speed around the Sun is about 30 kilometers per second. The main thing is that this rotational speed just cancels out the gravitational pull of the sun.

The centrifugal force that revolves around the Sun and is trying to break free from the gravitational pull of the Sun, which is a centripetal force that has been trying to pull the Earth into its embrace, is exactly canceled out. The earth can't escape, and the sun can't pull it over.

According to Einstein's general theory of relativity, the essence of gravity is the distortion of the surrounding space-time caused by the mass object, which leads to the formation of huge space-time traps and vortices in the space-time around the massive object.

The distortion of space-time is manifested in the form of gravity. There is only one way to get out of this vortex, and that is speed. This gravitational relationship to velocity produces at least two cosmic velocities.

One is the orbiting velocity, and the other is the escape velocity.

The orbital velocity is called the first cosmic velocity, and the Earth is kilometers away. When the orbital velocity is reached, it will rotate around the center of mass of gravity in a certain orbit, and it will not escape the pull of gravity and will not be pulled by gravity.

The escape velocity is called the second cosmic velocity, and on Earth it is called the disengagement velocity, which is kilometers per second. Every celestial body has an escape velocity, for example, the Sun's escape velocity is kilometers per second. This means that on the surface of the sun, when a speed of kilometers per second is reached, it can escape the sun's gravity and fly out of the solar system.

There is also a third cosmic velocity on Earth, which is the speed at which a spacecraft launched into Earth orbit escapes the sun's gravitational pull, which is kilometers per second.

The linear velocity of the eight planets is inherited from the angular momentum of the accretion disk of the star during the formation of the solar system, which is exactly in line with the orbital velocity, so it will always revolve around the sun, neither leaving nor approaching. Of course, this orbit has changed a lot since the early days of the formation of the solar system, and as the orbit changes, the orbital speed of the planets also adjusts. There is no air resistance in the universe, so there will be no big change in this angular momentum for billions of years.

Escape from the sun. Because the sun burns its own fuel, causing it to become lighter, and when it becomes less mass, the gravitational pull also becomes lighter, so the earth has a chance to escape from the sun.

It is neither near nor far from the Sun, its orbit is an elliptical shape that is close to the Sun and sometimes far away from the Sun.

They are in a state of relative equilibrium, sometimes they are closer, sometimes they are farther away, but they always move in the same line every year.

There is a theory:

The Earth is a part of the Sun, a tiny, tiny part that falls towards the Sun, and the Sun itself moves forward as it falls from the boundaries of the solar system. So the earth is with it.

Spiral-falling (coordinate system outside the solar system) only appears as an ellipse for a short period of time.

It all starts with the formation of the solar system, which originated from the primordial cosmic nebula. The particles of various substances attract each other due to the gravitational pull, forming clumps, and the small clumps form large clumps.

The clumps often collide with each other, some fall apart, others form larger clumps, and so on, and the largest clump becomes the sun.

It has a lot of appeal.

Thus there is an orbit around him, and the small clumps become planets and satellites revolve around the orbit, and because the earth is a planet, bound by the gravitational pull of the sun, there is a centripetal force to make an approximate circular motion, so the earth revolves around the sun.

I think it's a magnetic field!

Everything that exists has a magnetic field and influences each other!

There are so many planets in the universe, if they didn't have their own orbits and fly around, the earth might have collided with other planets long ago!

The sun is a star, the earth revolves around the sun, and the moon revolves around the earth!

If it weren't for the sun shining on the earth, the earth would be dark, with no sunlight, no warmth, and not even living things! The sun gives life to the earth, and all living things depend on sunlight to grow! The ancient Egyptians revered the sun, they considered it divine and bright!

I also love sunlight, but now that the atmosphere is being destroyed, ultraviolet rays are getting more and more harmful to people, and there are really few places where you can get healthy sunlight! That's a very happy thing!

Because the mass of the Sun is much greater than that of the Earth, for the system of the Sun-Earth motion, the common center of mass of the two moves. And this common center of mass is close to the sun, so it is generally believed that the earth is moving around the sun.

Teacher: Why does the earth revolve around the sun and the sun does not revolve around the earth?

Student: The force of the sun on the earth is much greater than that of the earth, and the earth revolves around the sun. The force of the Earth on the Sun is much smaller than the other forces experienced by the Sun, and the Sun does not revolve around the Earth.

Hehe, turning or not turning is relative, not absolute.

Now it is said that the earth revolves around the sun, which is based on the sun in the solar system. If you take the Earth as a benchmark, the Sun revolves around the Earth.

According to. The common sense of life is a vain.

This is a sick sentence, logical error, "no one can deny" double negative table affirmation, followed by "not around the earth....Coupled with the affirmative and negative connotations above, the meaning of the whole sentence is that "no one can pretend to believe that the earth revolves around the sun" is obviously a false statement.

Correction: No one can deny that the earth orbits the sun.

In the original sentence "no one can deny that the earth is a broad sail orbiting the sun", the double negative expression of "cannot be denied" is affirmative, so it is changed to affirm that the noisy sentence should be a liter eggplant:

Everyone is sure that the earth revolves around the sun.

Sometimes, in order to change the sentence without changing the meaning of the sentence and to make the sentence smooth, the words can be cut appropriately.