Is the sun getting smaller? What is the size of the sun?

1. Based on the mass of the Sun (m), smaller stars will shrink into white dwarfs (and smaller stars will directly change from main-sequence stars to white dwarfs because the center does not reach the temperature at which helium burns).

2. The internal temperature of a star with a mass greater than it can be 40-6 billion degrees Celsius during the contraction. It can erupt extremely violently after running out of fuel. Stars with smaller cores after the explosion will shrink into white dwarfs, and larger than and less than 2m will shrink into neutron stars.

3. If the mass of the core is greater than 2m after the explosion, then no force can resist the gravitational contraction. It will become a "black hole" capable of devouring everything that comes close to it.

It can be seen that the size of the sun is not static, and it changes from small to large and from large to small during its lifetime, and so on.

It's getting bigger

The sun is constantly expanding, and in the later process, whether the earth will be submerged or will do centrifugal motion to escape the solar system I think it depends on the mass of the sun, the density in the future, the rotation period, the rotation period of the earth, the rotation period and the revolution radius!

No. Judging by the fact that the weather is getting hotter and hotter right now. The sun should be getting bigger and bigger.

I'm not saying summer is here. Rather, it means that the temperature has increased every year. Also, I used to look at the materials.

Say 10 billion years from now. The sun's abilities are exhausted. will get big.

Destroy everything in the solar system. And then again**.

The sun will eventually turn into a big lump of iron.

I've heard of it, but that's a temporary change.

The diameter of the Sun is about 1.4 million kilometers, the diameter of the Earth is about 10,000 kilometers, and the diameter of the Sun is 109 times the diameter of the Earth compared to the Earth.

109 cubic, about 1300000. Well, the volume of the Sun is about 1.3 million times the volume of the Earth. According to research estimates, the age of the Sun is about 10 to 20 million years longer than that of the Earth, using radioactive dating.

The age of the earth obtained.

It is about 4.7 billion years, so we can get that the age of the sun is about 4.748 billion years. The lifetime of the sun is about 10 billion years.

Introduction to the Sun

The sun is the solar system.

The center of the celestial body, which occupies the overall mass of the solar system. The eight planets in the solar system.

Asteroids, meteors, comets, outer Neptune objects, and interstellar dust all revolve around the Sun, which in turn orbits the Milky Way.

The center of the revolution.

The Sun is an ordinary star in the Milky Way, with an average distance of 149.6 million kilometers from the Earth, a diameter of 1.39 million kilometers, an average density of cubic meters, a mass of grams, a surface temperature of about 6,000 Ke, and a core temperature of 15 million Ke.

From the inside to the outside, they are the solar nuclear reaction zone, the solar troposphere, and the solar bend atmosphere.

Thermonuclear reactions are constantly taking place in its central zone.

The energy produced is radiated into space.

The sun is actually changing all the time, but the degree of change is too small for its size to be observed. Moreover, the outer layer of the sun is not solid, but itself is constantly changing, like a rough ocean, so such small changes cannot be seen at all.

The sun's energy comes from the fusion reaction at its core, specifically the fusion of hydrogen into helium, which produces energy to maintain the balance of the sun.

According to calculations, 600 million tons of hydrogen in the core of the Sun undergo fusion reactions every second, of which 4 million tons of hydrogen are completely converted into energy release. This figure seems to us to be huge, but for the sun, the loss of 4 million tons of mass is really insignificant.

The energy produced needs to be released outward, but the sun's huge gravitational pull compresses the outer layer of matter towards the center, so the two forces form a balance, and this balance forms the sun as we see it today. But although it is balance, it is from a macroscopic perspective, and if you are close to **, the size of the sun is constantly changing.

That is to say, the sun is constantly going back and forth in the change of increasing and shrinking, just like two evenly matched forces in a tug-of-war, and the balance point is moving back and forth.

This equilibrium has been going on for billions of years, and it will remain so for billions of years in the future, until the energy generated by fusion is not enough to maintain the pressure when there is a large loss of hydrogen in the interior.

Today, the sun doesn't change too significantly on a macroscopic scale.

The principle of relativity of things, the difference in proportion, determines the size of the visual image!!

That's how we feel, it's not real, it's a visual error.

This is quite normal a size. For stars, they are generally very large compared to the Earth.

Why is the earth so small?It may be because the earth is small and the gravitational force is small, so life will not be directly flattened by gravity, so life will breed, so there will be life to ask the question that the earth is too small and the sun is too big.

For a star to be able to produce nuclear fusion reactions, its mass must be at least 80 or more Jupiter's mass, and if it is small, nuclear fusion cannot occur, and it cannot emit a large amount of heat and light, so it will not become a "sun".

It's not too big, but if you think about how big the universe is, you can understand the sun.

"Near big and far small"It is the objective law by which people observe objects, and it is precisely because of this law that the relative position relationship between various objects can be reflected in the field of vision.

However, people see that the sun at sunrise and sunset is "bigger" than the sun at noon, but it is not the reason why it is "big near and far small". In fact, the distance between people and the sun in the morning or evening basically does not change, and the reason for this visual effect is that the "reference" of people when observing the sun is different. For example, if the same one-dollar coin is placed in the palm of an adult's hand and placed in the palm of a child's hand, the effect is different, it looks small in the palm of an adult's hand and large in the palm of a child's hand.

This is because the reference object of the coin in the hands of an adult is a large palm, and the reference object of a coin in the hands of a child is a small palm, that is, the reference object is large and the reference object is small. In the same way, at sunrise, since the Sun is in the same field of view as nearby objects on the horizon (which are really large and far small), the reference of the Sun is these objects on the ground, and the Sun appears to be very large;At noon, because the sun is in the vast firmament, its reference is the vast expanse of space, so it seems small.

This is an illusion caused by people's subjective feelings, in fact, no matter what time of day the sun is observed from the earth, it is the same size.

Hello, "A Half Moon" is not the more the healthier.

Normally, it is normal for the thumb and index finger to have a nail and a half, but other fingers do not have to be attached to this "nail and half moon". On the contrary, there are too many "A and a half months", which means that people are often in a state of anxiety and tension, which is more common among intellectual workers. The range of moderate amounts is:

Within 4 of the 10 fingers there is a "nail half-moon", and each "nail half-moon" does not exceed 195 of the nail area.

From the perspective of traditional Chinese medicine, if the crescent moon on a person's fingernails is large and has a good luster, it indicates that the person's qi and blood are relatively abundant;If the crescent moon becomes smaller or gradually disappears, it means that the body's qi and blood are declining, and the physical condition is not as good as before.

Traditional Chinese medicine does record that the white crescent moon can judge whether the heart function of a person is good, and Chinese medicine believes that the liver stores blood, and the quality of blood circulation will directly affect the function of the heart, and the liver is concentrated on the human nails. Generally speaking, people with white crescents are full of energy, and the blood circulation is relatively smooth; The white crescent moon is relatively small or not at all, the heart qi is weaker, and the blood circulation may not be very good. The liver is open to the eyes, the main tendon, and its splendor is in the claws.

The results indicated that the prosperity and decline of liver blood could affect the withering of claw nails.

See if you have any of the following symptoms:

1) Qi deficiency 1Fatigue 2, lack of breath or lazy speech, 3, self-sweating, 4, tongue fat or tooth marks, 5, pulse weakness. Possess three.

2) Blood deficiency: 1. Pale complexion, 2. When standing up, the eyes are dim, 3. The lips and tongue are pale 4. The pulse is thin. Possess three.

Qi tonics: ginseng, codonopsis, astragalus, jujube, licorice.

Blood tonics: Angelica, Rehmannia, White Peony, Ejiao, Polygonum multiflori.

These crescent moons, commonly known as "little suns", are scientifically called "half-moon marks".

It appears in the lower 1 to 5 places of the nail, reflecting the lack of energy and vitality of the person. It is a window to health.

Vitality: nourishes the five internal organs, promotes the normal operation of the five internal organs, resists external evils, longevity and anti-aging substances, and genetic materials. As the saying goes: the strong are strong, the weak are sick, the young are old, and the exhausted are dead.

If you don't have enough energy, you need to supplement with protein.

Normal half-moon marks:

1. Quantity: 8-10 hands (the less energy, the worse the physique).

2. Status: Nail 1 5

3. Color: milky white, the whiter the better. Thank you.