How are cosmic celestial bodies constituted The forms of celestial bodies that exist in the universe

It is due to the sudden enlargement of the substance and then the sudden shrinkage.

There are many celestial bodies in the universe, including meteors, comets, moons, planets, stars, nebulae, black holes, quasars, massive dense halo objects (a type of celestial body that makes up dark matter, more than a dozen have been discovered, and it is speculated that it is likely to be formed by burning out stars) and dark matter. The composition of various celestial bodies varies greatly, for example, the hydrogen element on the sun is about three-quarters, the helium element is about one-quarter, and the oxygen content is less than one-thousandth; And the first element on Earth is oxygen, which accounts for about half of it. For example, although most stars are similar in composition to the Sun, some stars have carbon as the first element, while others have cobalt and iron in the majority.

However, the composition of some celestial bodies, such as quasars, black holes, and dark matter, is still in the hypothetical stage, and there is no exact proof of astronomical facts.

As an aside, do you want to ask "the elemental composition or physical structure of celestial bodies" or "how are cosmic celestial bodies formed?" ”。And, I think you should ask a little more clearly, because the term "cosmic celestial bodies" is too broad.

Celestial forms present in the universe: nebulae, stars, meteors, comets, planets, moons, gases in interstellar space, dust, etc.

Introduction to the universe: The universe is defined in a physical sense as all space and time and their connotations, including all forms of energy, such as electromagnetic radiation, ordinary matter, dark matter, dark energy, etc., of which ordinary matter includes planets, moons, stars, galaxies, galaxy clusters and intergalactic matter.

The universe also includes physical laws that affect matter and energy, such as conservation laws, classical mechanics, relativity, etc.

The Great Theory is a modern cosmological description of the evolution of the universe. According to the estimates of this theory, space and time appeared together after the great ** of 100 million years ago, and as the universe expanded, the energy and matter that originally existed became less dense.

The initial accelerated expansion is known as the inflationary period, after which the four fundamental forces known separate. The universe gradually cooled and continued to expand, allowing the first subatomic particles and simple atoms to form. Dark matter gradually accumulates and forms foam-like structures, large-scale fibrous structures and cosmic holes under gravitational pull.

Huge clouds of hydrogen and helium molecules were gradually drawn to the densest concentrations of dark matter, forming the first galaxies, stars, planets, and everything.

Space itself is expanding, so objects that are currently 46.5 billion light-years away from Earth can be seen, because these lights were generated 13.8 billion years ago and are closer to Earth than they are today.

The above content reference: Encyclopedia - Universe.

Nebulae: mass of matter that does not form a fixed shape, mostly particles, small objects;

Astral: has a fixed form of matter. It is divided into planets and stars. There are juvenile stars, adult stars, red giants, white dwarfs, brown dwarfs, neutron stars, and black holes.

Juvenile stars refer to stars that have just formed, and they need to be relatively massive to form stars, and the internal gravitational force causes the matter to undergo nuclear fusion and glow to form such stars. Adult stars are like our sun. A red giant is a stellar senile form of the mass of the Sun.

A white dwarf is an older form of a star that is more massive than the Sun, after which it becomes a neutron star, and when it is massive and old, it becomes a black hole.

The universe is a general term for the vast desert space and the various celestial bodies and diffuse matter that exist in it.

Such as the sun, planets, moons, asteroids, comets, meteors, interplanetary matter in the solar system, stars, star clusters, nebulae, interstellar matter in the Milky Way, and extragalactic galaxies, galaxy clusters, superclusters, intergalactic matter, etc. The infrared, ultraviolet, radio, X-ray, and ray sources discovered by radio and space detection methods are also celestial bodies.

Major types of celestial bodies in the universe:

Electromagnetic waves and gravitational waves.

Interstellar matter: It is a general term for the various substances that exist between the stars, which have both entities and propagating waves.

Nebula: A cloudy object composed of gas and dust.

Galaxies: Celestial systems, usually composed of hundreds to trillions of stars and interstellar matter, with spatial scales ranging from a few thousand to hundreds of thousands of light-years.

Stars: Stars are spherical or globheroid objects made up of hot gases that emit light on their own.

Planets: Larger bodies orbiting the Sun or other stars with no more mass than Jupiter.

Asteroid: A small object that orbits a star in an elliptical orbit and does not volatile gas and dust.

Neutron stars: Compact stars that rely on the pressure of degenerate neutrons to balance with gravity.

Black hole: A space-time region defined by a boundary from which only external matter and radiation are allowed to enter, and from which matter and radiation are not allowed to escape.

Quasars: Quasars are the most distant celestial bodies ever observed, at least 10 billion light-years from Earth. A quasar is a type of celestial object that is observed at a very long distance with high luminosity and strong radio power.

Quasars are much smaller than galaxies, but they release more than a thousand times as much energy as galaxies.

It's easy to imagine a "black hole" as a "big black hole", but it's not. The so-called "black hole" is such a celestial body: its gravitational field is so strong that not even light can escape.

According to the general theory of relativity, the gravitational field will bend space-time. When a star is large, its gravitational field has little effect on space-time, and light from a point on the star's surface can be emitted in a straight line in any direction. The smaller the radius of a star, the greater its curvature of space-time around it, and the light emitted at certain angles will return to the star's surface along the curved space.

The most important celestial bodies in the universe are stars and nebulae.

Celestial bodies are a general term for all kinds of stars in the universe and all substances such as gas and dust that exist in interstellar space, including: stars (such as the sun), planets (such as the earth), satellites (such as the moon), comets, meteoroids, meteorites, asteroids, star clusters, nebulae, interstellar matter, etc. Celestial bodies vary greatly in size, mass, luminosity, temperature, etc., and the most basic objects in the universe are stars and nebulae.

It is generally believed that stars are formed by the contraction, aggregation and evolution of nebulae under the action of gravity during their motion. After the formation of stars, they can eject a large amount of material into interstellar space and become part of the raw materials of nebulae. Therefore, stars and nebulae can be converted into each other under certain conditions.

Introduction to the most important stars in the universe:

1. Shield seat UY

The constellation Scutellus is the largest star in the universe, a red supergiant located in the constellation Scutellus, which is 5 billion times the size of the Sun. Due to the density and instability of its base, it is not possible to determine its exact size for the time being.

2. Cygnus NML

Cygnus NM is one of the largest known planets with a radius of 1640r, and is also one of the most luminous stars.

3、wohg64

WOHG64 is a red supergiant discovered in the Big Magerium Galaxy, which is 160,000 light-years away from Earth, and its volume is more than 7 billion times that of Tang Yang, and it is one of the top ten stars in the universe.

4. Westloo 1-26

Westerox is one of the largest stars ever discovered, with a large object state of about 1530 times the radius of the sun, and is a supergiant star with a very high temperature, and is the first intense radio source variable star discovered in human history.

5. Sagittarius VX

Sagittarius is a pulsating deformed, red supergiant star located in the constellation Sagittarius, which reaches 1520 times the diameter of the Sun, its volume is large, but the density is small, only 12 times that of the Sun, and it is one of the largest stars in the world.

The above content reference: Encyclopedia - Nebula.