Why can human eyes only see a few hundred meters clearly, but they can see the stars in the sky?

Because the light of the stars in the sky can travel to the earth, and the human eye can also receive the light of the stars, it is possible to see the stars in the sky.

Because the stars in the sky are actually very large, they can be seen by the human eye even at a very distant distance.

Because some of the stars in the sky are actually stars, and the volume is very large, and the whole sky can be seen in the whole sky when it looks about the size of a scene hundreds of meters away.

In the distant starry sky, as long as we are in the open area of the countryside or there are no dark clouds in the sky, we can always see countless stars twinkling in this dark sky, which brings a mysterious embellishment to the night sky, makes us yearn for this vast and boundless universe more, makes human beings reflect on their own insignificance from time to time, and inspires people to actively explore the world.

Although we can see the stars a lot less and more often than before, this beauty is still there. After all, being able to appreciate the beauty of nature and the entire universe is also a pleasure in life. So, when it comes to people who can only see a few hundred meters in their eyes, why can we see the stars in the sky?

I think the main reasons are as follows.

1. The stars are too big.

First of all, the first point is the size of the star, if you look at it from outer space, it is super huge, even bigger than a football field as we know it now. It's comforting that, of course, we can see it on our planet with our own eyes. So the stars that we see on Earth, they are the result of a reduction in distance, and it can be said that we can see these stars in the distant interior of the Earth is simply a kind of luck for us.

Therefore, many astronomy enthusiasts always like to observe the night sky for a night, and some enthusiasts also like to use digital electronic devices to photograph the stars in the night sky**.

2. The light emitted by the stars.

Secondly, it should be mentioned that the light emitted by the star is not as dazzling as the sun during the day, but in a dark sky, the light it emits should be very unique. This allows our eyes to distinguish these lights, as well as to distinguish these stars. If we observe these stars in outer space, we will see dazzling light, so distance is also a big reason why the light of the stars weakens and becomes very faint.

3. A resolution of our eyeballs.

Finally, the resolution of our eyeballs is about 10 microns to 20 microns, and these stars in the sky are obviously larger than that, so we can see them.

That's why our eyes can see the beautiful stars in the sky.

The human eye can see far away, and the reason why it is too small to see clearly. The stars in the sky are stars in the universe, and some are even nebulae, which are so huge that you can see tiny bright spots in such a distant place.

Because the light of the stars in the sky spreads to the eyes of humans, the eyes of humans can see the stars in the sky when they receive the light.

The stars in the sky that people see are all stars, and what people see is the light they emitted a long time ago.

In total, there are no more than 7,000 stars visible to the naked eye in the sky.

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

Stars (stars) are divided into 1st magnitude, 2nd magnitude, and 3rd magnitude stars according to ......their brightness from light to dark. It can be seen with the naked eye as a 6th magnitude star. There are 20 stars of 1st magnitude, 46 stars of 2nd magnitude, 134 stars of 3rd magnitude, 458 stars of 4th magnitude, 1476 stars of 5th magnitude, and 4840 stars of 6th magnitude throughout the day, for a total of 6974 stars.

In fact, due to the influence of moonlight, atmospheric transparency, eyesight, etc., there are generally only a thousand stars that can be seen.

In actual observations, due to the influence of many observation conditions, such as moonlight interference, poor atmospheric transparency, personal vision differences and other factors, the number of stars seen by ordinary people is less than 3,000. The ancient Greek astronomer Epaches was said to have excellent eyesight, and his catalog of stars based on his observations contained no more than a thousand stars. Therefore, when we see the starry sky, we count them carefully, and there are not as many as we think.

Most of the stars we see are stars, and the planets can only see 5 Mercury, Venus, Mars, Jupiter, and Saturn. Uranus can sometimes be seen, as well as the Moon, Neptune and Pluto are too far away from us, and their brightness is so low that they are invisible to the naked eye. Sputnik can also be seen.

How we can tell if a star in the sky is a star or a star depends on whether the star wants you to blink, the star is very far away from the earth, and the light they emit will flash and flash due to the fluctuations of the earth's atmosphere, as if they are blinking.

The planet is close to us, and it can't emit light on its own, it can only reflect the light of the star, so it doesn't blink and looks like a large circle.

Stars move but within the range of the constellations and move very slowly, whereas planets move quickly between several constellations.

We can also tell which planet it is by its color, Venus is white Mercury, Jupiter is pale yellow, Mars is red, and Saturn is yellow.

Mars, Jupiter, and Saturn can also be seen in the middle of the night, but Mercury and Venus are not, because Mercury and Venus orbit closer to the Sun than the Earth, and they are in the sky during the day, and we can't see them because of the strong sunlight, and at night we turn away from the Sun and can't see them, and we can only see them at some times when the sun breaks and the sun sets, and the best time to see Mercury and Venus is when the angle between their orbits and the Earth reaches its maximum, commonly known as the great elongation, and Mercury and Venus are called the western elongation in the west of the Sun, in the east of the sun is called the eastern elongation.

Satellites can also be seen, and satellites can only be seen before the sun rises and after the sun sets, because at this time the satellites that can be illuminated by the sun's rays turn away from the sun at night, so the satellites are not invisible. The satellite must be over your location for you to see, and it moves very fast, and now the city is very polluted with light, it is difficult for the satellite to see, it is recommended to use a telescope.

1 is Mercury and Venus taken from Earth, and 2 is Venus that I photographed with my phone.

Because of the earth