There are so many stars in the sky, why can t they be as bright as the moon, which doesn t shine?

It may be that these stars are not as bright as the moon that does not shine because they have different levels of light.

Because each star has a different function, this leads to this result.

Each of those stars is different, that's why it's like this.

I don't know much about this, but I think every object in the universe has its own role.

The moon shines because it reflects the sun's rays.

Stars that emit light through fusion or fission of their own matter, releasing energy that is emitted in the form of light. Stars that do not emit light appear to be as bright as the moon by reflecting the light of the stars, so they appear to glow.

Stars and emission nebulae emit light on their own, while reflective nebulae, planets and moons, comets, etc., reflect the light of stars and emit light. Others, such as dark nebulae and dark matter, do not emit light or reflect (relatively). Cosmic dust is very thin and reflects only faint light, such as zodiacal light and sunlight.

The moon itself does not emit light, only reflects sunlight. The brightness of the Moon varies with the angular distance between the Sun and the Moon and the distance between the Earth and the Moon, and the brightness of the Full Moon is more than ten times greater than that of the upper and lower strings.

The average brightness of the Moon is 1,465,000 of the Sun's, with brightness varying from 1,630,000 to 1,375,000. The brightness on average at the full moon is equal. It gives the earth an average of lux, which is equivalent to the illuminance of a 100-watt electric lamp at a distance of 21 meters.

The lunar surface is not a good reflector, its average albedo is only 9%, and the remaining 91% is absorbed by the moon. The albedo of the moon sea is even lower, about 7%. The albedo of the lunar highlands and craters is 17%, and it looks like the mountains are brighter than the moon sea.

This is because although the moon does not emit light and is bright towards the sun, the side towards the earth is sometimes bright during the moon's revolution, and it also has a certain reflective effect, so it is very bright in the night sky.

This is because the brightness of the sky itself is relatively low, so the moon will be particularly bright when you see it. It's not that the moon emits light, it's just that the light in the universe is relatively low.

That's because of the sun, and we see the moon a long time ago.

In an environment free of light pollution and atmospheric pollution, we can see the night sky dotted with stars, and even the Milky Way running through the sky. Quantitatively, we can see more than 2,000 stars in a single night, and more than 7,000 stars can be seen in the entire sky around the world. So, what are these stars?

How far are they from Earth?

Among the stars visible to the naked eye, a few are planets within the solar system - water, metal, fire, wood, earth, and Uranus, which orbit the sun like the Earth and are at a distance from the Earth from hundreds of millions of kilometers to billions of kilometers. None of these planets themselves emit light, and their bright light comes from reflected sunlight. Mercury and Venus are closer to the Sun than Earth, they are less angular distance from the Sun, and these two planets always rise and set with the Sun, so we only see them for a short period of time before or after sunset, and we can't see them in the middle of the night.

Due to the closest average distance to Earth and its relative proximity to the Sun, Venus is not only the brightest of the planets visible to the naked eye, but also the brightest star in the entire night sky (excluding the Moon).

Mars, Jupiter, Saturn, and Uranus are all farther from the Sun than Earth, and we can see these planets in the middle of the night. Mars, Jupiter, and Saturn are brighter and easy to see, but Uranus is difficult to see. Uranus is far away, and its brightness is close to the limit of what the human eye can perceive, and it is only easy to see gray and black areas in the Portel's classification of dark sky.

The star is in the night sky, and the star that exceeds is the star. They belong to the same class of celestial bodies as the Sun, and their core region is capable of nuclear fusion reactions, which produce light and heat. Since the stars are far outside the solar system, they appear to be inconspicuous spots.

In fact, most of those stars themselves are larger and brighter than the Sun, such as Sirius, Vega, Betelgeuse, and others. Since the universe is so large, only those stars that are bright enough will be visible to the naked eye on Earth. Keep in mind that although Proxima Centauri is the closest star to the Sun, it is a red dwarf, very faint and invisible to the naked eye.

Although Tianjin 4 is located 2,615 light-years away, it is a very bright blue-and-white supergiant with nearly 200,000 times the luminosity of the Sun, so it still appears very bright on Earth.

Most of them are stars, some are planets and moons that are relatively close to Earth, and some are glowing nebula galaxies or comets.

The vast majority are stars.

In addition to planets or moons that are closer to Earth, such as Venus, Saturn, Mercury, Jupiter, Saturn, as well as the Moon and artificial satellites.

The reason is very simple, because the planet does not emit light, it can only reflect the light of the star, so the light of the planet is relatively weak, and the atmosphere is blocked, it is difficult for the planet to enter people's eyes. Except for those that are closer to Earth.

The glowing stars in the sky are the other planets on the planet. Not all of them are stars, but there are also Saturn, Jupiter, Mars, and some smaller planets that are not named.

There are many glowing stars in the sky, one is a star that emits its own light, and another is a planet that is not a star and only looks glowing because of its reflection.

There are two concepts of a bright sky at night, one is that the background of the sky is brighter, but there are fewer or no stars; The second is that the background of the sky is dark, but there are many stars and they are bright. According to what you said, it should be the first case.

This situation is usually formed by the reflection of the ground light from the sky, that is, the sky is illuminated by the ground light.

There could be several reasons for this.

Cloudy with high clouds at low altitude. The ground light is reflected by the ground and enters the sky, and then diffusely reflected by the bottom of the clouds, and the sky looks brighter.

The air is humid and misty. When the temperature drops at night, the moisture in the air partially condenses into fog, diffusing the light from the ground and brightening the sky.

The air quality is poor and there is haze. Haze particles, like fog droplets, can also diffuse reflection of light on the ground.

There is sand and dust in the air at low altitudes. During a floating dust or sandstorm, the night sky is illuminated by the reflected light of the sand and dust floating in the air.

When people look at the starry sky on Earth, they can't see stars shining near the bright moon, mainly because the moon's intense light affects the adaptability of the human eye.

The adaptation of the human eye to light is a dynamic process. When a person is in a darker environment, the pupils of the eyes dilate to receive more light. However, when a bright light source (such as the moon) is present, the pupils automatically contract to limit the amount of light entering the eye, which can cause eye overheating and visual distortion.

Since the moon itself is a bright celestial body, its light causes the pupils of the eyes to shrink to a lesser extent. This means that when we look at the area near the Moon, the pupils of the eyes have shrunk to a relatively small state, and we can't pick up enough light to catch the glow of other fainter stars.

Therefore, sometimes when we look at the area near the Moon, the surrounding stars may be obscured by the moonlight, or difficult to detect by our eyes because of the constriction of the pupils. This is one of the reasons why there are no shining stars near the bright moon.

It's Venus. The night sky is second only to the moon, and Venus is at its brightest until just before sunrise or after sunset. Venus in the early morning is also called the morning star.

It is sometimes a morning star that appears in the eastern sky before dawn and is called "Qiming is sometimes a dusk star, and the yellow vertical nucleus appears in the western sky after dusk, and is called "Chang Gung".

In order of distance from the Sun, it is the second, the astronomical unit of distance from the Sun. It is the closest planet to Earth (Mars is sometimes closer).

The second brightest star in the night sky after the Moon is one of our nearest neighbors, Proxima Centauri. Alpha Star is the closest star to us and is located about light-years from Earth. It is a red dwarf star with low brightness, but under proper viewing conditions, it can be observed in the night sky.