Why are there stars in the sky, please 3Q

In fact, the stars exist just as much during the day as they do at night. The reason why you can't see it during the day is because the sun's rays are strong during the day, while the stars are weaker and can't be seen by the sun's rays. Reasons why you can see the moon during the day:

The moon is closer to us than the stars, and it appears larger, so we can sometimes see it, but we can also feel that the moon is not bright during the day, which is the concealment of the sun's rays. In addition, there is some material about the stars, which is also pasted up: On a clear night, we see countless stars in the sky, and the colors of the stars do not differ much, they are basically yellowish-white.

But in reality, the colors of the stars are different. If you look at these stars with a telescope, you will see that they come in a variety of colors, which are very beautiful and pleasing to the eye The different colors of the stars are determined by their own temperature. Depending on the temperature of the star's surface, the color of its light will be different.

For example, the surface temperature of a star that glows white is very high, up to more than 11,500 degrees; Stars that glow red, with a surface temperature of 2600-3600 degrees; Stars that glow blue have a surface temperature of 25,000-40,000 degrees. The surface temperature of the sun is 6,000 degrees Celsius, and it looks yellow. Because we are very far away from the stars, and because of the refraction of the atmosphere, we cannot see the colorful light of the stars with the naked eye.

Trouble, thanks!

The stars are planets, and there is a sun during the day, so you can't see them because the sunlight is very strong. At night, there is no sun and the reflected light is seen. I don't know if you're not satisfied.

1. Because of stars and so on, most of them are the process of hydrogen fusion into helium nuclei to release energy, and some of them are helium fusion to release energy, which is far away from the earth and shows outside the atmosphere, which looks like small stars shining.

2. There are two main factors that determine whether people observe the stars as light or dark: it is due to the size of the star's luminous ability, and the distance between the star and people.

This begins with the origin of the universe: the universe is the general term for the vast desert space and the various celestial bodies and diffuse matter that exist in it.

The universe is the material world, which is in constant motion and development. For thousands of years, scientists have been searching for when and how the universe came to be. To this day, many scientists believe that the universe was formed by a big ** that occurred about 13.7 billion years ago.

The matter and energy in the universe are gathered together, and condensed into a very small volume, the temperature is extremely high, the density is extremely high, and the huge pressure is generated in an instant, and then a large ** occurs, and the reaction principle of the big ** is called quantum physics by physicists. The big ** caused the matter to be scattered, the cosmic space continued to expand, and the temperature also dropped accordingly, and then appeared in all galaxies, stars, planets and even life in the universe one after another.

The largest modern astronomical telescope can see more than 1 billion stars.

Astronomers divide the stars in the sky into 88 constellations according to their regions. Among them, the northern sky (bounded by the celestial equator) has 29 constellations; There are 46 constellations in the southern sky and 13 constellations in the north and south of the celestial equator. As long as we have patience and count the stars in one constellation, we can count the stars that can be seen with the naked eye.

According to the calculations of astronomers: 6 stars of magnitude 0; 14 stars of 1st magnitude; 46 stars of 2nd magnitude; 134 stars of 3rd magnitude; 458 stars of 4th magnitude; 1476 stars of 5th magnitude; 4,840 ...... of 6th magnitudeNo more than 7,000 in total.

If we use a telescope, the situation is different, and even with a small astronomical telescope, more than 50,000 stars can be seen. The largest modern astronomical telescope can see more than 1 billion stars.

In fact, the number of stars in the sky is much more than that. The universe is endless, and what modern astronomers see is nothing more than a tiny, tiny part of the universe.

Because the stars are cosmic stars like the earth, what we see on the earth is other stars, and the earth is also a star when we see on other stars, most of those stars are stars in the universe, and we can see them when they shine at night, and they are actually there during the day, but the sunlight is too strong and covers the light of those stars, so we can't see it.

Most of the stars in the sky are on the same level as the sun.

Stars, the vast majority of which belong to the Milky Way, like our solar system.

It's just so far away that we can only see a small dot.

Because the moon is afraid of loneliness at night.

So I called the stars up and spent the long night with her.

It's not that there are so many stars in the sky, how can there be only one moon?

Most of the stars are stars, and stars are made up of various elements such as helium and nitrogen, which were created during the formation of the universe.

Stars are celestial bodies like the earth, and they are the form of material existence and movement formed by the condensation of matter after the universe.

It is divided into planets and stars, and the criterion is whether it emits light or not.

The Sun is a star.

Just as the big planets are planets, the planets can reflect the light of the stars, so we can also see planets that don't emit light, such as the moon.

Some stars are arranged in a certain pattern, we call them constellations, such as Orion, many stars and planets gather together, and regular movement forms galaxies, such as the Milky Way, the problem of the universe We have explored very little, more contact, will broaden our horizons.

Because there can be no orangutan ...... in the sky

The cosmic systems that people now know are as follows: first, there are two major systems: the total galaxy and the nebula composed of cosmic dust. The total galaxies include the Milky Way, where the Continental Sun System is located, and extragalactic galaxies, which in turn are composed of numerous star systems.

The so-called Pysen star is a star that can emit light and heat on its own (the sun is the star as we know it). Our Earth belongs to the solar system, and the solar system belongs to the Milky Way, and there are about 200 billion stars in the Milky Way, so there will be many star systems. The light emitted by these stars travels in a vacuum to the Earth, so we see the glowing stars, because most of the stars outside the solar system are very far away from the Earth (the farthest light at 300,000 kilometers per second will travel for tens of thousands of years, and it is estimated that we will not be able to see it with the naked eye).

The so-called stars bump.

In fact, it is a huge star (even bigger than the sun) that is far away from our earth, and because they are so far away from the earth, we see that the other stalls are just bright dots.

So there will be stars in the sky.

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I've seen it in the dust"Heavenly"In fact, it is a vast and boundless cosmic space, in which there are a large number of celestial bodies and planets, some of which can shine like the sun, but because they are too far away from our earth, we can only see them at night, and they appear to be very small, which is what we call stars.

That's not the stars.

That's a different galaxy or nebula!

We can only see it as a bright spot with the naked eye.

There are still very few individual stars that we can see with the naked eye!

The stars we see are not real stars, but their projections on the celestial dome, which is why we look at the stars without feeling which star is far away and which is closer. During the day, the sky is bright, and the light of the stars is dim relative to the sun, so we can't see it.