Why are there stars at night and why are there stars at night?

It's because of gravity.

At the beginning of the formation of the universe, there were no stars, when the whole universe was a diffuse hydrogen cloud, and later due to some small density imbalances in the hydrogen cloud, some areas with higher density gradually gathered and collapsed under the action of gravity, and finally formed a spherical star under the action of gravity, and its core part produced nuclear fusion under the action of huge gravity, releasing huge energy while forming substances with high atomic numbers such as helium, thus producing the first stars. During the combustion of massive stars, the fusion reaction of their inner cores is upgraded layer by layer, synthesizing carbon, oxygen, silicon, iron and other elements, until the end of its glorious life in the form of a supernova explosion. The enormous energy released during the supernova explosion further synthesized a variety of chemical elements with a higher atomic number than iron, which were erupted into the universe to form nebulae and gradually enriched over a long period of time, and some parts of the fragments of dead stars were concentrated to form new stars and/or galaxies under gravitational attraction, in which areas rich in heavy elements formed solid planets like the Earth, and life evolved under the right conditions, which is why we exist.

Without gravity, there would be nothing left in the universe except hydrogen and a small amount of helium.

Stars are everywhere, but the sunlight is too dazzling during the day to be visible, and most of the stars seen at night are stars, that is, stars that emit light on their own.

There are also during the day, but the sun is too bright during the day to see.

Stars in space reflect the sun's light, so you will see the stars.

There are stars at night, this is because the stars themselves do not have the ability to emit light as celestial bodies, and the reason why they can shine at night is because they are reflecting the sunlight they receive, and during the day the sun's light is very strong, while the light of the stars is weaker, so we can't see them in the white sky. But in reality, they exist like the night.

In fact, there are stars at night and during the day, but because the day is too bright to see the stars, and at night when the sky is dark, you can see the stars.

If you encounter similar problems in the future, you can follow the following ideas to solve them:

1. Find problems: often live in the world, always in these various kinds of contradictions, when some contradictions are projected into consciousness, the individual only finds that he is a problem, and asks to find a way to solve it. This is the stage where the problem is discovered.

From the perspective of the stage of problem solving, this is the first stage and the premise of solving the problem.

2. Analyze the problem: In order to solve the problems found, it is necessary to clarify the nature of the problems, that is, to figure out what contradictions there are, which contradictions, and what is the relationship between them, so as to clarify what results the problems to be solved, the conditions that must be met, the relationships between them and what conditions have been met, so as to find out the important contradictions and key contradictions.

3. Put forward hypotheses: on the basis of analyzing the problem, put forward hypothetical solutions to solve the problem, which can be adopted, including what principles and specific ways and methods to take, but all of these are often not simple and ready-made, and there are various possibilities. However, putting forward hypotheses is the key stage of problem solving, and correct assumptions lead to the smooth solution of the problem, while incorrect and inappropriate assumptions lead to detours or lead the solution of the problem astray.

4. Verify the hypothesis: The hypothesis only proposes n possible solutions, and there is no guarantee that the problem will be solved, so the last step in problem solving is to test the hypothesis. In either case, if the test does not produce the expected result, a new hypothesis must be proposed and tested again until the correct result is obtained, and the problem is not solved.

Stars exist in the sky all the time, and they cannot be seen by young eyes during the day, and can only be seen at night when the weather is clear. The stars that people see at night are the starlight formed by the reflection of sunlight by stars, planets, satellites and other celestial bodies in space, and the reflected light wave formed by reflecting sunlight is weak, and people can only see it with the help of the dark curtain of the night sky, and the reflected light is canceled during the day, so the human eye cannot see the stars.

There are stars day and night, and some stars are stars that can emit light by themselves, but most of the stars reflect the light of other stars. They have a weak light and are not easy to observe during the day when disturbed by sunlight, but they can be seen at night.

The stars are always there, but the sun is strong during the day, and at night when the sun goes down and it gets dark, the light of the stars is seen.

It's not just at night that there are stars. Instead, you can only see the stars at night. The stars are always there. It's just that the sunlight is too strong during the day and we can't see the stars.

This is an ignorant child who asked this question, how do the stars shine, because of the sun's care, you think that if the stars are under the direct illumination of the sun during the day, you can't see the stars on the earth, this is because the stars can't be shown in the sun's light, the light of the stars is too weak

It should be said that the stars cannot be seen with the naked eye during the day, but the stars can be observed with radio telescopes or telescopes placed in outer space during the day. The specific reasons for this are explained in other buildings. The most concise and straightforward reason is:

There is the sun during the day, and the sun is so bright that you can't see the other glowing spots.

Stars are always available, and people can only see them at night when the weather is clear without the help of a telescope.

There are always reasons why there are always stars at night

Stars reflect the sun's light: When the night falls, we can see a lot of shining stars in the night sky, in fact, the star itself does not have luminous properties as a celestial body, and the reason why it can shine in the dark night is because it reflects the sunlight it receives.

The moon shines is also a kind of reflection: the principle of the stars in the night sky and the moon is the same, the only celestial bodies in the universe that can emit light by themselves are stars such as the sun, planets and satellites cannot shine, and the moon is a kind of satellite, so the light of the moon we see is also its reflection of the sun's light.

Comets: Glowing stars in the sky and stars like Halley's Comet that drag out their long tails, and these stars can shine because their materials are melting as they pass through the solar system, which is a special and rare phenomenon.

Interaction between stars: In addition to the above reasons, there are also situations where stars interact with each other, such as stars scattering light from each other, which can cause the light of some stars to be obscured by other stars.

To sum up, there are many reasons why there are always stars at night, including stars reflecting sunlight, the moon shining is also a reflection, comets, and the interaction between stars.

There are always stars at night because the sun's rays do not reach the other side of the earth, and the rotation of the earth allows the stars to be seen by observers in the night sky. These stars are actually the stars of their jailed galaxy, and the light they emit reaches our eyes after traveling through the universe, forming a beautiful starry scene.