How long has it been since you ve seen a pure blue sky?

I saw it in the vegetable patch when I was very young!

It feels like the sky is round.

It looks close.

Grab it. It's far away.

The clouds in the sky are moving.

Slowly. On the go.

This one is daytime.

At night. It's dark.

There are many stars in the sky.

Dense. It makes you want to count.

But. I can't count them.

There are no clouds in the sky.

The moon also rarely meets.

Another time I saw a shooting star streak.

It walks among the stars.

One is gone.

This is the bluest sky I've ever seen.

It's been a long time since I've seen a blue sky! Xi'an is seriously polluted! Don't talk far! Even the high-rise buildings on the next street in the city are not very clear! I miss the blue sky of my childhood! Nostalgia for the starry sky of my childhood! I miss that popsicle when I was a child.

The sky is blue every day

It's just that you're missing to discover.

Because there's never going to be a clean sky anymore, and they're all smiling on me.

I love sky blue. At such a moment, such a quiet street, a person walks quietly, there is no hustle and bustle of cars and horses around him, and no one socks are surging in this tide, walking and walking, the sun begins to become warm, the wind is also blowing moist, and there is no cold in the past. If you look up again, you will find that the sun is getting closer and closer to you.

Playfully stretched out his palm to catch the sun's rays, and carefully held it in the palm of his hand to play. The light shimmered like finely shredded gold.

Love sky blue. There are no impurities, no greed, just like someone so deeply and silently, without bothering or entanglement. When we are together, we may not have a lot to say, we have our own space, we have our own freedom, but our hearts are stable.

knows each other's hearts, and has long defined this relationship as eternal. When there is no contact, it is clear that love is a kind of persistent perseverance, and it is a kind of loyalty of the Duan clan. The best love is at this moment, walking under the sky blue, the heart is quiet, the body has strength, so the mood is happy, and the steps are broad.

Walking quickly, we will go to the beautiful spring. The nameless grass on the side of the road has already sprouted. She opened her lips vigorously towards the blue sky, and between her breaths, the breath of spring was tightly locked.

It seems that the more you breathe, the more opportunities you have to grow. Every grass knows how to grasp every ray of warm sunlight vigorously. It's the same for people, in a limited life, many things need to be fought for with hard work, so that they can live a more wonderful life.

Women are more charming, men are more reckless.

Soon, soon it will be time for spring to bloom. The road I walk alone is the same road that many people have walked, and they follow theirs, only me, and after walking for a while, I will look at the sky overhead. - The sky is so blue, it's the blue of the sky.

The sky is blue because air molecules and dust in the atmosphere scatter blue and violet light in the solar spectrum.

The dawn is red because the rising sun has a low altitude and the sun's rays travel the longest distance through the atmosphere. In the solar spectrum, red light, which has the longest wavelength, has the strongest penetrating ability, so dawn is red.

The sky is not as blue as it used to be, and the main reason is car exhaust and industrial exhaust.

These exhaust gases combine with dust and impurities in the air, creating a barrier at the bottom and middle of the troposphere. So the sky doesn't look so blue anymore. In fact, if you fly in the stratosphere, you will find out. In fact, the sky is still so blue.

In severe cases, fog may form. The whole city is gray, and it's uncomfortable to watch.

Because the earth is so polluted, car exhaust, chemical plants, and so on, it's strange that the sky is still the same as it used to be.

Because there are not enough greenery on land, the sky in the countryside is relatively blue, relatively speaking.

Because you wear tinted glasses.

Everyone knows that the sky is blue, but not everyone knows why it is blue.

In the sky above our planet, there is a thick layer of atmosphere. Air has no color, so what about blue?

There are seven colors in sunlight: red, orange, yellow, green, blue, indigo, and violet. Red light is the strongest, orange, yellow, and green are also stronger, and the weakest are blue, yellow, and violet.

When the sunlight penetrates the thick atmosphere, the red light runs the fastest and passes through it at once; followed by orange, yellow, and green lights; Most of the blue and indigo light are detained by the atmosphere, and they are pushed around by the dust and water droplets in the atmosphere, and they are reflected back and forth, resulting in the atmosphere being "dyed" blue.

The sky is blue from the ground, but if you look out at the sky from an airplane, the sky is even bluer. If you take a spaceship to a higher place to look at the sky, then the sky is not blue, but purple, because of the weakest violet light, most of them can't even enter the first door of the atmosphere.

The sky is colorless, but due to the refraction of sunlight, it has color. And that's why the sky looks dark at night. At night, the sun does not shine on this half of the earth's sky, and without strong sunlight, the sky has no color, and some, it is only black.

Of course, there is also the light of the moon and the stars, but the moon does not shine, the light of the moon reflects the sun's light, of course, it is not bright, and the stars are too far away from us, so the night sky we see will not be as bright as the day.