Why are galaxies usually accompanied by nebulae?

Because under certain conditions, nebulae and stars can be converted into each other. Nebulae and stars are "related" by blood. The gas ejected by the star will become part of the nebula, and the nebulous matter will be compressed by gravity to become a star.

So it's the same substance to a certain extent, so that it can explain to you why the nebula is always near the galaxy.

Nebulae contain almost all malleable celestial bodies except planets and comets. Nebula is the original meaning of the English root word "cloud". We sometimes refer to galaxies, star clusters, and all types of dust and gas in space as nebulae.

Galaxies outside of the Milky Way (some of the old usages still remain, e.g. the Andromeda Galaxy still uses the name Edwin Hubble used before Edwin Hubble discovered it, known as the Andromeda Nebula). Nebulae are also often areas of star formation, such as the Eagle Nebula. This nebula depicts NASA's most famous image:

Pillars of Creation. The gases, dust, and other materials formed in this region are crowded together, accumulating huge masses, which attract more mass, and finally large enough to form stars. It is known that the remaining material can also form planets and other celestial bodies in planetary systems.

Nebulae are cloud-like objects formed by the combination of gas and dust in interstellar space. The density of matter in the nebula is very low, and if you measure it by the standards of the earth, there are some places that are vacuum. However, nebulae are very large, often tens of light-years in circumference.

So, in general, nebulae are much heavier than the Sun.

Nebulae are polymorphic in shape. A celestial body that looks like a mist. All non-stellar clouds of gas and dust outside the Milky Way.

This is constantly formed in the vicissitudes of the universe.

This is a kind of protection for galaxies when they are born.

This is the change in the movement that occurs when the galaxy is created.

Probably the atmosphere on the surface of each planet.

Tokens, like guards.

The galaxy is not lonely when it is accompanied by a nebula.

This is a natural phenomenon, and there is no reason for it.

That's because the planets have a gravitational pull

Because as they work, they form other substances accordingly.

This is a family, all star-level, appearing together.

The difference between nebula and galaxy is that nebula is contained within a galaxy. A nebula is a cloud-like object made up of gas and dust from interstellar space. A galaxy is an island in the universe with countless perpetual stars and various celestial bodies, while a galaxy in a broad sense refers to the operating system of countless galaxies and dust.

Heavenly body; Refers to stars, planets, moons. For example, the sun, the earth, the moon.

Galaxy; It is formed by the convergence of many stars, such as the Milky Way and the Andromeda Galaxy.

Nebula; It is one of the celestial bodies made of thin gas or dust. At the beginning of the formation of the universe, galaxies were also formed by the evolution of nebulae.

Heavenly body; It is formed by the combination of various gaseous elements in the universe.

Various spherical elementary stars scattered throughout the universe.

For example. Earth or Venus, Mars, etc.

Galaxy; is artificially placed next to each other.

A group of planets with a certain meaning.

Such as. A galaxy made up of the stars Cowherd and Vega.

Or solar galaxies.

Nebula; It is composed of stars in the universe that are in the same air source body.

The space system of the universe.

Such as. The galaxies of the Milky Way are located in the same cyclonic body.

Such a stellar celestial body.

It forms a dense collection of cloudy asterisms.

For this. Planets are spherical individuals in the general sense.

Galaxies are groups of planets in the anthropogenic sense.

Nebulae show the density of planets in celestial structure and human vision.

For this. Planets and nebulae and galaxies.

It's all human visual sensitivity.

Linguistic and cultural statements expressed.

When your language is ideological.

When a certain level of education is reached.

You can also structure it in your own way.

Present it in categories.

A galaxy is a cluster of planets such as the Milky Way. A star system is a planetary agglomeration of planets around the center of the solar system. The planet is the Earth, the moon.

Nebulae are areas of gas and cosmic dust in space, most of which are left over from the explosions of previous generations of stars.

A celestial system of huge numbers (hundreds of millions) and interstellar matter is called galaxies.

Giant spherical bodies made up of various substances are called planets. Planets have a certain shape and have their own orbits.

Nebulae are interstellar clouds where dust, hydrogen, helium, and other ionized gases gather.

The exponential amount of galaxies is a system composed of galaxies and interstellar dust.

Planets are giant spherical bodies made up of various substances called planets. Planets have a certain shape and have their own orbits.

Nebulae are one of the celestial bodies made of thin gas or dust. It contains almost all malleable objects except planets and comets.

Nebulae contain almost all malleable celestial bodies except planets and comets.

Galaxies: Celestial systems that are usually composed of hundreds to trillions of stars and interstellar matter, with a spatial scale of thousands to hundreds of thousands of light-years.

Differences: 1. Galaxies are large collections of matter, and nebulae are small collections of matter, that is, the total amount of matter contained in them is different, and galaxies are much larger than nebulae. Geometrically speaking, galaxies generally occupy a huge scale of tens of thousands to hundreds of thousands of light-years, while nebulae are generally inside galaxies, with a scale of only a few hundred light-years, and rarely exceed a thousand light-years;

2. Nebulae exist inside galaxies and are part of the matter of galaxies;

Galaxies originated in nebulae, but the universe has survived to this day, and the original nebulae no longer exist, and they have evolved into galaxies, so the current nebulae are all remnants of the galaxy that have not evolved into stars, or secondary nebulae (planetary nebulae) that erupt when stars die.

Nebulae galaxy constellations, nebulae contain almost all of the stars except for the source stars and comets

There are malleable celestial bodies. Its main component is zhihydrogen dao, followed by helium, and also contains a certain proportion of metallic and non-metallic elements. Since the launch of the Hubble telescope in 1990, research has also found that it contains organic molecules and other substances.

Nebulae look like cloud-like objects, non-stellar clouds of gas and dust.

In a broad sense, galaxies refer to the operating systems composed of countless star systems (including the self-bodies of stars) and dust (such as nebulae). The Milky Way, for example, is a large galaxy containing stars, gas, cosmic dust, and dark matter, and is bound by gravity. A constellation is simply a line of stars in an area of the sky, named by a person.

Star clusters, stars.

Clouds, constellations, galaxies are not the same set of concepts. Constellations are the ancients' method of dividing the sky regions, and it is possible that a star in the constellation is a galaxy in itself, just because it is too far away, it looks like a star. Nebulae are further divided into gas nebulae and galactic nebulae, all of which are different concepts.

Regarding the hierarchy of the structure of the universe, it can be arranged in order of size as follows: star systems (e.g., solar system), galaxies (e.g., Milky Way), galaxy clusters, superclusters, total galaxies, universe.

A constellation is made up of a number of stars, such as the constellation Centauri, many constellations, that is to say, many stars, that make up galaxies, like the Milky Way Galaxy, and many galaxies together that make up a nebula, like the Grand Nebula of the Boat.

Stable! Stabilize each other! Just like the sun stabilizes the solar system!

Nebulae are generally thin-density, bulky collections of matter. It is generally considered to be the cradle of stars and galaxies. Galaxies are clusters of celestial bodies where nebulae evolve and stars form. Constellations are considered to be divided into constellations. aqui te amo。

Difference Between Nebula and GalaxiesA nebula is a cloud-like object made up of gas and dust from interstellar space.

The density of matter in the nebula is very low, and if you measure it by Earth's standards, there are places where it is almost a vacuum. But nebulae are very large in size, often tens of light-years in circumference. As a result, nebulae in general are much heavier than the Sun.

Galaxies are islands in the vast ocean of the universe, inhabited by countless stars and various celestial bodies, called galaxies in astronomy. The Earth we live in is in a huge galaxy called the Milky Way. In the universe beyond the Milky Way, there are hundreds of millions of space islands like the Milky Way, which are collectively known as extragalactic galaxies.

In a broad sense, galaxies refer to the operating systems composed of countless galaxies and dust (such as nebulae).

First of all, you have to know what a nebula is, a nebula is the phenomenon that the material of the universe forms a group of whole at a higher density, and the nebula we call is actually most of the material in the universe with hydrogen as the main body scattered in a relatively dense area, of course, when many stars are relatively densely scattered in an area, it can also be said to be a nebula, nebula is very important, a nebula rich in hydrogen can be said to be a factory of synthetic matter, the cradle of stars, when the hydrogen element in the nebula gradually polymerizes due to gravity, After reaching a certain mass, ultra-high gravity can trigger nuclear fusion to form what we call the sun, in which the largest sun, that is, the supernova, has a very short lifespan, but when it erupts, it will fuse out a denser elemental substance, such as our sun, basically fusion to the limit of iron, and then the elements basically rely on supernova, it can be said that without these rare heavy elements and even life is difficult to evolve, after the supernova eruption, the unused hydrogen element will continue to polymerize into a smaller mass of the sunIt can be said that nebulae are factories in the universe, just like our Milky Way, and it is also at that time that the nebulae at the beginning repeatedly converged to form supernovae, and then exploded, in order to produce heavy elements that converge to travel stars, for example, the earth is the core of iron, because iron is the main element produced by stars, so the most, the remaining small amount of hydrogen elements can also be polymerized into more stable yellow dwarfs, that is, our sun with a lifespan of about 8 billion years, in fact, stars larger than our sun are emitting dazzling blue light, The lifespan is only tens of millions of years, and supernovae are even shorter, so that a stable Milky Way galaxy containing hundreds of billions of stars and even galaxies is gradually formed, of course, there may be some accidents during the period, such as the gravitational pull or even collision between galaxies. It can be said that the solar system and even the entire galaxy are evolved from the nebula produced after the big **, of course, even if there are still nebulae in our galaxy that have not been "used up", in fact, the Milky Way is medium to small in the mass of the known galaxies observed by humans, and it is still relatively barren, and our solar system, just on the edge of one of the galactic coefficient bar cantilevers, can be said to be a poor country, it may be because of this, there is a relatively stable environment for human reproduction, It's just that the resources are very poor.

It cannot be understood by including that there are nebulae inside the Milky Way, smaller than the Milky Way, nebulae in outer space, larger than the Milky Way, and even the whole galaxy is being born inside. So you can't understand it in terms of inclusion and being included.

Basically, it doesn't matter, so I asked if there is a nebula in the solar system? If there is a relationship, it is also the sun.

Back to the end of life.

Wait for things. The harmonious relationship between voices, then it should be the nebula contained in the Milky Way or the Milky Way in the nebula, of course, I am thinking about it. By the way, I will send you a few pictures to supplement your knowledge.

The original state of matter was the nebula, which developed and evolved to form a large number of stars, which are a regular composition of a large number of stars and their planets.

It's a complicated name.

The definition of astronomy in Chinese is also confusing.

Generally speaking, galaxies refer to groups of at least tens of billions of stars such as the Milky Way, while nebulae generally refer to areas within galaxies where a large amount of dense gas gathers, such as the Orion Nebula.

-- This is the standard definition of astronomy.

But, again, the use of nouns is confusing.

Sometimes, in some articles, a galaxy refers to a certain group of celestial bodies similar to the solar system composed of multiple stars + planets, such as the solar system;

At the same time, the Andromeda Nebula is not actually a nebula, but an extragalactic galaxy.

Therefore, some of the more serious articles are accustomed to using the word "river system" to refer to large galaxies such as the Milky Way. For example, I am used to using it when referring to a celestial body such as the Milky WayRiver systemThe word is notGalaxy; This word, because the word galaxy is prone to ambiguity.