Why is the sun round? When the sun is at its maximum

Gravitational forces cause it to be circular, and the maximum time to see the Sun on Earth is at perihelion, which is January.

The sun is made up of gases at very high temperatures.

And the gas is extremely fluid.

Because the mutual gravitational pull between the internal materials of the sun is stronger than the external gravitational force that interferes with it.

Therefore, the sun also shows the effect of the surface tension of the fluid.

It will always try to keep its surface area to a minimum.

We know. Only if an object is a sphere.

It's the surface area that's the smallest.

So you have the answer to your question.

Because of the gravitational attraction of the sun's core, the plasma-like hydrogen on the surface of the sun begins to rotate in order to resist this gravitational force and is not drawn into the core, forming an ellipsoid (the sun is not a positive sphere). The Sun is at its maximum in the moment before it is about to die (i.e., it becomes a nova). In old age, the Sun will be like a normal star, because the hydrogen element at the core of the thermonuclear reaction consumes light, expands and becomes a red giant.

Originally, the sun should not be round when it was born, this should be related to its rotation, if there are edges and corners, in the rotation of air friction and combustion, it will definitely derive a law suitable for the survival of all things, this is like football, if you make a square, you will kick for a long time, and roll for a long time, it will be close to the circle without limit. That's the truth, it's not good, hopefully!

Anyone who has studied in high school knows that the equipotential surface of the gravitational field is a spherical surface, and if the sun, a planet with such a huge gravitational force, is not in the same equipotential plane, the potential energy is not equal, and the gravitational force is not equal, then it is unstable, and it will be stabilized until it is transformed into the same equipotential plane (equivalent to water flowing low and landslides).

It's actually related to the knowledge of physics.

First of all, let's take an example from life, for example, if water is thrown out, it can only be a round object, and it is impossible to produce other shapes, so only a circle is the most stable shape.

And due to the action of force, it also produces rotation, so the planet, including the sun, can only be a circular sphere.

In space, because it is not affected by gravity (the gravitational force of the planet is negligible when considering the problem of the sun itself), the probability of the gas** expanding in all directions is equal, so it is spherical. It's like blowing a soap bubble, where gravity and buoyancy are balanced, and the force is equal in all directions to form a spherical shape.

If the sun is square, then the different parts of the square sun, such as the vertex and the edge, must be different in the shape of the square, and the distance from each point to the center of the circle is equal, so the force is equal, so the circle is the most stable, and it is inevitable.

1.First, all celestial bodies are spherical (circular).

2.According to gravitational attraction, an object is attracted by its center; Only the center of the circle is equidistant from the center to the border, (because only the radius of the circle is equal);

3.Therefore, only every part of the surface of the sphere is equally attracted by geocentric attraction;

4.Therefore, under the effect of equal attraction, any celestial body will become spherical (circular).

The Earth's orbit around the Sun 1 m0 is an ellipse that a w is close to a perfect circle, and the sun is located on the focus of one m g i in the elliptical orbit of t, so that in one c year 0, is o to be in one g day b 3, and the distance between the earth on day 3 is in the non-stop change of 4 g 3. At the beginning of January 5 every year, the Earth is located at the 2 points of the closest day of the orbit of G around the Sun 4 km 5, and the distance between the Earth and the Earth reaches the minimum I value, which is about 100 million C kilog meters. At the beginning of May 4 every year, the Earth is located at 1 point in the aphelion of the orbit of the Earth around the Sun 4 m4, and the distance between the Earth and the Earth reaches the maximum p-value, which is about 100 million q kilometers.

Compared with the average distance of 1 place on a day (100 million s thousand m meters), the difference of 7 (100 million k km mm) between the distance of 4 places in a day of z in a year r is almost 7 negligible 8. Then n in a U day Q 7, day 3 The change in distance 8 is even more insignificant. If we have to compare the distance between the morning and the day and the day of the middle 6 noon and 1 to the ground by 4 to 8, some people will think that the sun of 4 is closer to the sun of 4 in the middle of 4 noon and 8 in the middle of the day, and the reason is that the sun of the morning is shining from the horizon of 0 in the direction of 1, which is farther than the distance of the radius of the earth of g and x k of the sun of the sun of 3 and 4 noon 2.

Whether this statement is correct or not, let's divide it into 2 and analyze one o under m. From the data on the E surface of 0, it can be seen that from 4 parts in March 31 to 0 parts in June, in half a year, the change in the distance between the three places on a day 5 reached 6 million t kilog meters (100 million h kilon meters minus 100 million U kiloQ meters), and the change 0 value of 0 in Q per day was 10,000 u thousand a meter, from 8 morning to mid 2 noon 8 large J about 3 small F, it was 3 quarters of 2 n a c day 1, and the change of distance between 7 places on a day 1 was about 54422 thousand l meters, and this m value was a large h in the radius of the earth in s. If the earth is moving towards 6 o'clock near the sun, from 8 morning to mid-5 noon 2, one g square 4 is indeed close to v a u k The distance of the earth radius (more than 1200 kilometers I), and the other m square 5 sides pass through a quarter of 8 s a c day 7, and the distance between day 1 and the ground is also d close to s2567 thousand q meters, the two are superimposed, and the middle 3 noon 2 is closer to the Taig Yang v.

But if the earth is moving towards 2 o'clock in the far sun, from 0 morning to mid-7 noon 4, a k square 5 from 8 earth to the sun of the sun is also close to i a l e the distance of the radius of the earth (more than 1600 thousand c meters), but the other x side 6 sides pass through the quarter of 8 w a n day 3, the distance of the day 3 is far x5667 thousand y, the two are superimposed, and the middle 0 noon 4 is farther away from the sun n . Therefore, whether it is close to Tai B Yang at noon 1 in the middle of the 5th day, or close to Tai D Yang in the morning, it depends on which p period of time it is.

The reason for the rotation.

The sun is a high-speed rotating object, in the process of rotation, the center of the sun's gravitational field is equal to the edge of the position, if the sun is not round, if it is square, then in the same gravitational field, the surface cover of the sun to the core of the sun (central force field point) is not equal, then it will affect the rotation of the sun, which will cause a very unstable phenomenon, because there is a gravitational field, then a centrifugal force will be generated in the process of rotation, under the action of a centrifugal force, If it is square, then the force at the edge point of it is not the same, there is a force difference between the objects, in mechanics it is relative motion, the final result of the movement under the action of the force difference is a state of equilibrium, the force between the edge points of the rotating object tends to be in a state of equilibrium, only in the ball can be reflected, if the sun is square then its surface is very unstable, I think we will not evolve so developed.

Because the earth rotates.

And it has the presence of a magnetic field.

With the rotation. The material on the surface of the earth is constantly moving closer to the center of the earth under the attraction of the magnetic field.

The presence of rotation and magnetic fields makes them evenly distributed on the surface.

That's why the earth is round.

The reason for the rotation.

The sun is a high-speed rotating object, in the process of rotation, the center of the sun's gravitational field is equal to the edge of the position, if the sun is not round, if it is square, then in the same gravitational field, the surface cover of the sun to the core of the sun (central force field point) is not equal, then it will affect the rotation of the sun, which will cause a very unstable phenomenon, because there is a gravitational field, then a centrifugal force will be generated in the process of rotation, under the action of a centrifugal force, If it is square, then the force at the edge point of it is not the same, there is a force difference between the objects, in mechanics it is relative motion, the final result of the movement under the action of the force difference is a state of equilibrium, the force between the edge points of the rotating object tends to be in a state of equilibrium, only in the ball can be reflected, if the sun is square then its surface is very unstable, I think we will not evolve so developed.