It has been found that large star systems outside the Milky Way have

In our solar system, the Sun is the only star, and our Earth is one of the largest rocky planets, but it belongs to the title of the largest planet, Jupiter, which is a gaseous planet, with a volume of 1300 times that of the Earth and a mass of 318 times that of the Earth, which can be said to be much higher than the Earth, but compared to the Sun, Jupiter is far from the same, regardless of size or mass, the Sun is 1000 times that of Jupiter, so, how different is the planet from a star?

<>Who are the largest known stars and planets? Remember, big stars don't have the mass of big stars, so what are the biggest stars and planets we've detected? Probably many friends have heard of the star Scutum Uy, which is 4.5 billion times the size of our Sun and 200 million times that of the Earth, and if it is placed in the center of our solar system, then it will go beyond the edge of Jupiter's orbit and approach Saturn, that is, including the Sun, Mercury, Venus, Earth, Mars, the asteroid belt and Jupiter, it can only operate in its body.

It's nothing short of a monster. The shield is a very small constellation. The Milky Way passes through the constellation of shields.

The stars that make up the constellation Shield are very faint, and the brightest stars, the Shield, are equal in brightness. The rest are stars of magnitude 4 or 5. UY is a star in the constellation Shield.

How big is a pure finch in the uy of the shield seat? Previous observations have shown that UY is about 1708 times the diameter of the Sun. We can simply calculate, how many kilometers is the diameter of the sun in 1798 times?

The diameter of the sun is 100 million kilometers, so the diameter of the shield UY is about 100 million kilometers.

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So far, Zheng Haotang, the biggest star in these skins is the shield shouting group sign UY, which is very big, and there is no other star more than this big star.

The constellation Uy, the star is very far away from us, and its volume is more than 5 billion times that of the Sun.

It is UY in the constellation Shield, a red supergiant star located in the constellation Shield, and this star is the largest one.

UY Shield, the planet is a red supergiant star with a diameter of 1,697 times the radius of the Sun.

The largest star in the Milky Way is UY Shield, the largest star currently known.

The Sun, the Sun is the largest star in our Milky Way.

The largest star in the Hehan system is the constellation Uy, which is the largest known star.

The Milky Way refers to the entire vast planetary system, including the solar system. （）a.That's right. b.Mistake.

Correct answer: B

Answer Analysis: This question is false. It is a scum system of "Mori Eggplant", not a planetary system.

The Milky Way contains about hundreds of billions of stars. The conclusion is that the volume of the Milky Way is divided by the mass of the Sun, and the volume of the Milky Way refers to its light-years, divided by the mass of the Sun, just because the Sun is a star, and for other stars, we still know more about the Sun, so we use the Sun as a measure.

In addition, the Milky Way has 850 billion low-mass stars (such as red and brown dwarfs) and their moons and planets, which account for 450 billion times the mass of the Sun. The average mass of all stars is smaller than that of the Sun, but a small fraction of them, about one to four billion, are similar to the mass of the Sun, so on average, the mass of such stars is slightly less than half that of the Sun. Each star has an average of 3-4 planets, each planet has an average of one moon, and each star system has its own asteroid belt.

Thus, the total number of planets around such stars in the cosmic galaxy reaches trillions*, and their satellites are trillions. Because of the very small masses of these small stars, red dwarfs and brown dwarfs, all stars and their corresponding planets, moons, and asteroid belts can easily be contained within the mass of 450 billion suns.

For stars, there are also some large objects that account for 300 billion times the mass of the Sun, such as black holes, stellar nebulae, quasars, magnetons, red giants, supergiants, supergiants, and so on. The average mass of all these stars is twice that of the Sun. Many celestial bodies, about 25-50 billion of them, have less than twice the mass of the Sun.

The average mass of these celestial bodies is times that of the Sun. For ease of calculation, the upper limit is 50 billion. These 50 billion stars account for only 75 billion times the mass of the Sun.

Each of these 50 billion stars has an average of two planets, each with a moon, and some have asteroid belts or cosmic dust. So now there are 100 billion planets and 100 billion moons, or more.

Each star has an average of 2 planets in its orbit, and each planet has 1 moon. Thus, there are 150 billion planets and 150 billion moons. We are left with 750 times the mass of the sun.

We need to allocate these masses to 25 billion large or super-large objects, with few planets or moons in them. They have three times the mass of the sun. Based on an average of one planet and one moon per star, an additional 25 billion planets and 25 billion moons will be added.

The Milky Way contains tens of thousands of stars. There are countless large and small galaxies in the Milky Way, and each galaxy has a star in it, at least tens of thousands, and the scope of the Milky Way is constantly expanding, and there will be even more in the future.

The Milky Way galaxy is vast, and there are indeed many solar system-like galaxies in it, containing tens of thousands of sun-like stars.

Yes, the Milky Way contains tens of thousands of stars, and the Milky Way is very large, and it is also very good, and it is very beautiful.

This is also true if it is a visual description of the Milky Way.

There are more than 100 billion stars that can be observed in the Milky Way, and the estimated total is more than 200 billion! The total mass of the Milky Way is 140 billion times that of the Sun, and a large number of stars are densely clustered in the central region of the silver core with a diameter of 10,000 light-years and a thickness of 10,000 light-years!

These stars are not exactly the same as the Sun, they are not exactly the same temperature and size as the Oak Sun

1. The blue star has the highest temperature, with a surface temperature of 25,000, such as the cross star;

2. The temperature of the white star is second, the surface temperature is 7000 11500, such as Sirius A;

3. The temperature of the yellow star is again, the surface temperature is 6000, for example, the second of the South Gate, our sun is also a yellow shining star if you look at it from a long enough distance, and the surface temperature is 5000

4. The lowest temperature of the red star is only 3600

The Sun is a star in the main sequence phase, in the middle of its evolution.

There are so many stars like the Milky Way outside the Milky Way, why? What is the abbreviation?

Galaxies outside the Milky Way, abbreviationExtragalactic galaxies

It has been discovered that there is a large group of stars like the Milky Way outside the Milky Way, such as what galaxies and which galaxies?

Let's name a few of the more famous ones:

m31The Andromeda Nebula (system), etc., the farthest celestial bodies that can be seen with the naked eye can be found in autumn without obvious light pollution.

Large Magellanic Nebula(Department) and so on,The Small Magellanic Nebula(system) and so on, all of which are companion galaxies of the Milky Way, which are very obvious in the Southern Hemisphere.

Straw Hat Galaxy M104Black-eyed galaxy M64- A galaxy that can be observed with a small telescope and has a strong artistic sense of distinctiveness.

Leo triple galaxyStephen's Quintet Galaxy。A goal that can be done by ordinary enthusiasts, it is suitable for astrophotography.

Wheel galaxyHastelloy Galaxy- A unique product of galaxy mergers and collisions, but with low luminosity, beyond the scope of the average hobbyist.

Note: Due to space limitations, only the most characteristic galaxy clusters have been selected above. A large number of galaxies that are bright and have aesthetic value, but are not distinctive enough (e.g., M81, M82, M101, M87, etc.) will not be introduced one by one.

A system of about 200 billion stars.

According to the data, the Milky Way has a mass of about one trillion solar masses, and there are about 200 billion star systems in the Milky Way, and the Sun is only an insignificant star among them. With a diameter of about 200,000 light-years and hundreds of millions of star systems, the Sun is one of the intermediate-mass yellow dwarfs, which were formed about 4.5 billion years ago and have an estimated lifespan of about 5.5 billion years, and then further evolved into red giants and finally white dwarfs. <>

The stars of the Milky Way are in an inhomogeneous state, oblate spherical in shape, and are composed of four cantilevers, the Sun is located on the cantilever of Orion, about 10,000 light-years away from the galactic center, which is a huge black hole equivalent to 4 million times the mass of the sun. The sun is located in the Milky Way, and it is impossible to see the whole picture of the Milky Way, and at night when there is no light pollution, the Milky Way can be seen in the night sky alternating between light and dark, which is the cross-section of the Milky Way. <>

In the Northern Hemisphere, there are about 3,000 stars visible throughout the year, the farthest is about 7,000 light years, and the seamount is about 7,500 light years above the ground. Most of the stars in the Milky Way are either low brightness or too far away to be seen by the naked eye, and only through telescopes can we see stars that we cannot see with the naked eye; For example, the absolute magnitude of the Sun is only a single magnitude, and it is almost impossible to see with the naked eye at a distance of about 60 light-years.

In 2019, scientists used Hubble's data to make a preliminary estimate of the mass of the Milky Way, speculating that the mass of the Milky Way is about a trillion solar masses, and there are about 200 billion stars, which are allocated to the whole world, and there are about 30 per person. In a system of about 200 billion stars, and their complex forms operate, some independently form a single star system, such as the Sun; Some form a binary star system, such as the Polaris, Daling V and other binary star systems; There are also star concentrating systems, such as the constellation Centauri, which has seven stars.

There are about 200 billion stars in the Milky Way, some of which form independent single-star systems, some binary star systems, and some cluster-star systems.

Although there is only one star in the solar system, there are hundreds of billions of galaxies in the Milky Way. According to scientists' calculations, the mass of the Milky Way is about a trillion times that of the solar system, and there are hundreds of billions of star systems.

According to the existing model, there are about 200 billion stars in the Milky Way. These stars, along with their planetary systems, and nebulae that permeate space, form a disk-like structure with a diameter of 10 to 200,000 light-years and a thickness of about 2,000 light-years.