How stars are formed, how stars are formed

Stars are materialized.

Stars refer to celestial bodies in the universe that are visible to the naked eye. The activity of the energy inside the star makes the star irregularly shaped. From our point of view, stars are not formed, but appear within the scope of our observation.

The demise of every planet will be accompanied by a great quarrel with the appearance of meteorites and stones, which are the so-called stars after being irradiated by the sun.

Satellites

Moon. It is an example of a natural satellite that is displayed in the brightest of the rolls. in the solar system.

, except for Mercury.

With the exception of Venus and Oak, other planets have natural satellites. The total number of known natural satellites in the solar system is at least 160.

A natural satellite is a planet that orbits a planet, which in turn orbits a star. For example, in the solar system, the sun is the star, and our earth and other planets revolve around the sun, the moon and the earth.

1. Planets such as Celestian orbit our earth and other planets, and these planets are called natural satellites of the planets.

Jupiter. of natural satellites, 17 of which have been confirmed, and at least 6 more have yet to be confirmed. Natural satellites vary in size and vary greatly from one another. Some of them are only a few kilometers in diameter, for example, the two small moons of Mars, as well as Jupiter, Saturn, Uranus.

Some small satellites on the periphery. Others are larger than Mercury, such as Titan.

Callista and Callisto, both of which are more than 5,200 kilometers in diameter.

The stars we see are stars, planets, moons, or neutron stars, and they form in the following ways:

1. Neutron stars: After the formation of stars, stars with masses greater than the Sun may form neutron stars after they collapse. The formation time depends on the mass of the star and the rate of spontaneous ignition.

2. Planets: They are formed by the impact and aggregation of asteroids in the universe, or by the separation of large rocky planets. It does not emit light on its own, we can see that it reflects the light of other stars, and the time of formation is after the formation of the star, or after the formation of the star is touched by other stars.

3. Satellites: The formation is basically the same as that of the planets.

4. Stars: It is due to the nebula dust floating in the universe absorbing the asteroids or other materials next to it, and then through aggregation, compressed to the center, at a certain time, due to the high temperature and nuclear fusion reaction, and then through the large ** to form a star. As for how long it will take, it depends on the size and mass of the nebula.

The larger the size and the higher the mass, the faster it will be formed, which will be between hundreds of millions and billions of years.

The stars in the sky are celestial bodies in the universe that are visible to the naked eye. The earth is also a celestial body in the universe, and the reason why it looks like a star is because these planets are far away from the earth, and they appear to shine by reflecting the sun's rays, and the stars can be roughly divided into planets, stars, comets, white dwarfs, etc.

The shape of a star in the sky

If not affected by external forces, all objects have a tendency to concentrate towards the center under the action of gravitational force, and the most concentrated result is a spherical shape, although the star is solid on the surface, but because the solid is also deformable, and the solid particles can move, these make it possible to transform it into a spherical shape.

The energy inside the stars is irregularly shaped by the energy withering, but the stones of the mountains are driven downward by the gravitational pull of the stars, and the rivers carry the sediment from the heights to the low-lying oceans, these are all examples of concentration towards the center, and they all make the stars turn from irregular to spherical, and if the interior of the star stops moving, the star may become a very standard spherical shape after many billions of years. Defeat.

Many asteroids, due to their relatively small mass, resulting in their own gravitational force is relatively small, and the star is generally composed of relatively hard solid rock, it is difficult to complete the process of moving to the central branch under the action of its own gravity, so their shape is strange, oval, rod-shaped, but for a variety of reasons, the star is just an ellipsoid close to spherical.

Formation of stars:

1. The process of star formation is very slow, and it can take millions of years to crack and slag. Before the star was born, it was a huge molecular cloud filled with dust and gas. Such molecular clouds are also called nebulae or dark nebulae; These molecular clouds are rich in large amounts of hydrogen molecules (H2) and helium molecules (He), as well as some other particles.

In general, these molecular clouds are very cold and stable.

2. Nearby supernovae** or galactic collisions may release huge shock waves and energy through molecular clouds. ** It is caused by the huge shock wave and energy generated by the collision between the plates.

3. In the molecular cloud, this energy will be disturbed by gravity, and it will begin to collapse under its own gravity, resulting in hydrogen molecules and helium molecules coming together, which increases the mass of the center of the molecular cloud. The increase in mass increases the gravitational pull, which attracts more molecules and particles from the surroundings.

4. As more and more molecules and particles collapse or fall into the center of the cloud, the center begins to heat up. This heated center, or heated core, is called a protostar. Protostars continue to attract more molecules and become hotter and hotter until the temperature and pressure reach a point where the protons can fuse with each other to form helium atoms and release large amounts of light, heat, and radiation.

5. This process is called nuclear fusion. When this happens, the inward force of gravity is slowly balanced by the outward force generated by heat and radiation. Once the pair reaches a long-term stable equilibrium, a star is born.

6. Stars refer to celestial bodies in the universe that are visible to the naked eye. The activity of the energy inside the star makes the star irregularly shaped. Stars can be broadly divided into planets, stars, comets, white dwarfs, etc.

7. The brightness of the stars is often expressed by magnitude. The brighter the star, the smaller the magnitude. The brightest planet is Venus, the fastest star orbiting at more than 2.4 million kilometers per hour, and H1504+65 is the hottest white dwarf.

Big**Big**: The prelude to the universe was unveiled About 15 billion years ago, an earth-shattering big ** occurred - the universe was born! At that time, the universe was a very dense fireball with a temperature of several trillion degrees.

There are many particles in the pulsating chain, which collide with each other. These particles are the basic units that make up all the elements in the universe.

After the big **, when the matter that makes up the galaxy in the universe appears large, the proton is already there, and less than a minute after the big **, the helium nucleon is produced. After about 100,000 years, the temperature of the universe gradually decreased, and the proton and helium nucleons combined with electrons to become hydrogen atoms and helium atoms, which are the main elements that make up galaxies.

Take our galaxy as an example, look at the formation of the universe scattered in the universe of matter is sparse and dense, the dense area of gravity is larger, will suck the nearby gas, more and more, become a large gas mass, and slowly shrink, this is the primordial galaxy cloud.

Our Milky Way is just one of them, the Milky Way in the Milky Way is densely distributed in the Milky Way, the dense areas will shrink and condense, and finally shine brightly, and the stars will be born, and the Sun is our Milky Way2'One of 00 billion stars.

Since the 17th century, the British scientist Isaac Newton discovered universal gravitational endurance, that is, all objects in the universe including stars, the sun, the moon, planets and other objects have mutual attraction, the greater the mass of the object, the greater the attraction, the distance between the objects increases, the gravitational attraction will weaken, all galaxies in the universe, the formation of planets, are controlled by gravitational force, interstellar matter gathers to form galaxies, planets.