Why do people say that the sun is about the size of the stars?

The radius of the core region of the Sun is 1 4 of the radius of the Sun, which is about more than half of the mass of the entire solar structure of the solar structure. The temperature of the sun's core, which reaches 15 million, is extremely high, and the pressure is also extremely high, allowing a thermonuclear reaction from hydrogen fusion to helium to take place, thus releasing enormous energy. This energy is then transmitted through the radiation layer and the troposphere to the bottom of the sun's photosphere, through which it radiates outward.

The density of matter in the central region of the Sun is very high. Up to 150 grams per cubic centimeter. Under the attraction of the sun's own strong gravity, the central region of the sun is in a state of high density, high temperature and high pressure.

It is the birthplace of the sun's immense energy. The energy generated in the central region of the Sun is mainly transmitted in the form of radiation. Beyond the central region of the sun is the radiant layer, which extends from the radius of the sun at the top of the thermonuclear center to the radius of the sun, where the temperature, density, and pressure decrease from the inside out.

In terms of volume, the radiant layer accounts for the vast majority of the total volume of the Sun.

In addition to radiation, there is also a convection process in which the energy inside the sun travels outward. That is, from the radius of the sun to the bottom of the sun's atmosphere, this interval is called the troposphere. The properties of this layer of gas vary greatly and are very unstable, forming obvious upward and downward convective movements.

This is the outermost layer of the Sun's internal structure. We all know that the volume of the sun, the earth and the moon are very different, why is it that the moon and the sun are almost the same size when seen with the naked eye on the earth, the stars on the earth are always so small and shining, and there is no celestial body that is slightly smaller than the moon and slightly larger than the sun, and the earth is just fixed in the precise position of the moon and the sun, which is really too coincidental, right? If it weren't for the advanced technology, human beings would never know that the earth was round, and they might think that the earth was as big as the sun!

The Sun is 8 light-minutes away from us, which is 480 light-seconds, and the Moon is only 1 light-second away from us, which is like if you take a pencil and put it in front of you, compared to a building in the distance, it seems to us to be about the same, but it is not.

The stars also rise in the east and set in the west. It's just that the stars aren't as conspicuous as the sun and moon, so you don't pay close attention. It takes a whole night for any star to go from rise to set, and at night you're sleeping, not looking closely.

The solar photosphere is the circle of the sun that we usually see, and the solar radius is also the radius of the photosphere. The photosphere is located outside the troposphere and is the lowest or innermost layer of the solar atmosphere. The surface of the photosphere is gaseous, and its average density is only a few hundredths of that of water, but because it is 500 kilometers thick, it is opaque.

There is intense activity in the atmosphere of the photosphere, and the surface of the photosphere can be seen with a telescope with many dense spot-like structures, much like rice grains, which are called rice grain tissue. They are extremely unstable, generally lasting only 5-10 minutes, and their temperature is 300-400 °C higher than the average temperature of a photosphere. It is believed that this rice grain structure is caused by the violent convection of the gas below the photosphere.

Another well-known activity phenomenon on the surface of the photosphere is sunspots. Sunspots are huge air vortices on the photosphere, most of which are nearly oval in shape, and appear darker against the background of the bright photosphere, but in fact their temperature is as high as about 4000, if the sunspots can be taken out alone, a large sunspot can emit the equivalent of a full moon. The occurrence of sunspots on the surface of the Sun is constantly changing, and this change reflects a change in the energy of solar radiation.

The change of sunspots has a complex periodic phenomenon, with an average activity period of years. That's because you're north of the mid-latitudes in the Northern Hemisphere, so Beidou just draws circles in the sky every day and doesn't fall. It is the same thing to draw a circle and the stars rise and set in the west, but this circle is above the horizon and does not intersect with the horizon, so it never sets.

In terms of volume, stars are generally larger than the sun.

Stars and the sun are both stars, but the sun is close to the earth, so they think that the sun is bigger, in fact, most stars (that is, the stars) are much larger than the sun, even tens of millions of times larger than the sun, hundreds of millions of times larger.

It's just that the stars are far, far away from human beings, and the reason that the stars are small and small.

Classification of stars.

1. According to the type: stars, planets, satellites, dwarf planets (this classification is only in the solar system), small celestial bodies (asteroids, comets, etc.).

2. According to the stage: novae, main sequence star, red giant, supernovae (divided into the following white dwarf stars, neutron stars, black holes).

3. According to size: (maroon-red) dwarfs, (blue, blue-white, yellow, red) giants, (blue, red) supergiants.

4. According to the spectrum: O, B, A, F, G, K, M and additional types such as R, N, S, etc.

5. According to the combination: single star, double star, star cluster and star cluster.

6. Other classifications: non-variable stars, variable stars. Variable stars are divided into: Cepheid variables, eclipse variables.

The Sun is one of the medium-sized stars, because it is close to us, so it is relatively large in my field of vision, and most of the stars we see in the night sky are distant large stars or star clusters, and there are also near-Earth planets, such as Venus and Mars. Sometimes there are also asteroids, comets, meteors. In short, there are many categories of celestial bodies in the universe, and only a small part of what we humans can observe, but there are also many types, so it is difficult to make a simple conclusion about comparing a star with a group of stars.

The Sun is the central star of our solar system, and it far surpasses other stars in size and mass. However, it is true that there are stars in the universe that are larger than the Sun, and these stars are known as supergiants or supergiants. They are much larger and more massive than the Sun, making the Sun appear relatively small in comparison.

However, such supergiants are rare in the entire universe of Ashishin. Based on our current observations and understanding, it is estimated that there may be only a few hundred or fewer supergiants in our galaxy.

One of the most well-known supergiants is the Cygnid VY star, which is considered to be one of the largest stars currently known. Its diameter is estimated to be about 1,600 times larger than that of the Sun. There are other known supergiants, such as Vx Leo and V483 Canis Major, which are also recognized as extremely large stars.

It is important to note that due to the vastness and complexity of the universe, there is still much to be discovered and studied about what we know about the stellar chakra. As a result, scientists are constantly making observations and researches in an effort to expand our knowledge of the stars in the universe.

According to the current observations and research of Burning Socks, there are about thousands to tens of thousands of stars larger than the Sun. These large stars may be supergiants, supernovae pikeys, or other types of stars that play an important role in the universe. However, this is only an approximate estimate, and the exact number may change as science progresses.

There are three combinations of the two stars of the sun star in the same house, which are influenced by different main stars and spikes, and their personalities will be slightly different: the sun giant gate calls for liquid Bu - Geng is upright and strong, hearty and eloquent. The sun is too cloudy - both rigid and soft, amorous and righteous.

Sun Tianliang - positive, promising, mature and steady.