It s pitch black in space, and the sky is also empty, why is it blue?

The main reason for this is that there are so many stars and planets in space. Whereas stars emit light, through the refraction of light, they will appear like this.

Because the sea is blue, the color of the sea reflected in the sky is blue. Water vapor in the sky, the atmosphere can reflect the color of the seawater.

The universe is different from the earth, it is indeed vacuum, and the universe is at the same time vast and endless, plus it is not like the earth is under the protection of the outer atmosphere, so it sees black. As we all know, our earth is just a grain of sand in the ocean to the universe, and the galaxy we live in is just one of many galaxies. We are talking about being in the solar system, at the edge of the universe, in relatively safe space, where there are eight planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, and each planet is different, and the internal environment and the outer universe are very different.

The universe is indeed vacuum, there is no oxygen in the vacuum environment, can not breathe, as for why the universe is not transparent, and looks black, is the following reasons: first, the universe is vast, endless, it has no end, there is no beginning, our solar system is just the end of many galaxies, marginalized existence, therefore, the universe is still the universe, next to the galaxy is still the Milky Way, there is no end, there is no time, so, The universe is not transparent, and neither is it transparent; Secondly, the universe is indeed black, because everything has no color, black is the original color, the color we can see with the naked eye on the earth, all because under the protection of the earth's atmosphere, through the direct line of sunlight, through reflection, accepted by our naked eye, the color is produced, and in the universe, it is different, in the vast space of the universe, there is no environment like the earth, so what we see is black; In the future, with the development of science and technology and our exploration of the universe, we will know and discover more secrets in the universe, and the future awaits us.

Generally speaking, the universe is a vacuum, but it is not transparent, but because the universe itself has no visible light, so it is precisely because of this that the universe is indeed dark. This is also due to the following reasons.

Because there are many celestial bodies in the universe, and the distance between the celestial bodies is very far, Tuanheng means that the brightness of each celestial body is different, and most of the light will be sucked away by the matter of the universe, and then we feel that the universe is black.

Summary. The reason why the sky is blue is because the molecules that make up the atmosphere scatter the shorter wavelengths of the sun's visible light, such as blue light and violet light, in all directions, including our eyes. However, in the absence of these substances, light is emitted from its source and travels in a straight line until it is received.

Since space is almost vacuum, this means that these particles are almost non-existent in space, and there is nothing between stars and planets that can disperse light and bring it into our eyes. Since no light enters our eyes, what our eyes see is naturally a black hole.

Why is it that a spaceship is flying in space, and it is pitch black during the day?

Okay, dear, the question has been received, please wait a minute.

The reason why the sky is blue is because the molecules that make up the atmosphere scatter the shorter wavelengths of the sun's visible light, such as blue light and violet light, in all directions, including our eyes. However, in the absence of these substances, light is emitted from its source and travels in a straight line until it is received. Since space is almost vacuum, this means that these particles are almost non-existent in space, and there is nothing between stars and planets that can disperse light and bring it into our eyes.

Since no light enters our eyes, what our eyes see is naturally a black hole.

Is there air in the spaceship.

What is the difference between planets and stars?

There is no air in space.

The biggest difference between a planet and a star is the relationship between the two, the star is the central object in the star system, and all the planets in its system are affected by the gravitational pull of the star and orbit the star. In addition, planets refer to celestial bodies that do not emit light, while stars are spherical light-emitting plasmas held together by gravity that emit light on their own.

What do astronauts rely on to breathe?

Astronauts mainly rely on the space station to breathe in space, and the air of the space station is generally divided into two types, one is the air from the earth, and the other is the space station's own production. The ISS has a well-developed system of oxygen replenishment and air filtration, all of which are configured according to the composition of the air on Earth.

I can shoot stars with a camera on Earth, but not in the universe.

There is an atmosphere and dust obscuration, but you can't shoot the stars? You told me that the stars are too dim to be captured, so isn't it even more impossible to capture the stars on the earth? I guess you can't fool elementary school students with this answer, right?

Don't talk nonsense if you don't know, I'd rather believe that the earth is a prison than this, hehe.

The universe is black because there is no light, while the sky is blue because there is an ozone layer outside our earth, and the ozone layer is blue.

Because the dust particles in the sky absorb the blue light waves and refract them into people's eyes, people see that the sky is blue.

It is because the Earth's atmosphere can only accept blue light, so it is blue.

By gradually lifting the camera from the earth to the sky, we will find that the universe is really too vast and each of us is insignificant compared to the earth. But for astronauts, they will feel it even more deeplyWhen they looked down at the Earth in orbit, did they feel that human civilization was really too small compared to the vast space?, but many people have questions, why is there a sun in space, but the ** background that comes back is pitch black?

Through the porthole of the spacecraft, we can all see the dark outside, in factScientists have already given the answer, when we look at the earth, the sun's rays are abundant, but in the vast expanse of space, a little sunlight is nothingBecause the universe is so big, just like a candle can illuminate an entire bathroom, but it can't illuminate a field of a thousand square meters.

In addition, many of the lights and colors we see can only be reflected before they can be seen in front of everyone's eyes, but in the vast universe, there are very few things that can directly reflect the light of the sunTherefore, the whole universe is actually endless, and it is likely that there are other parallel universes outside the universe we see, and space is really too big, so it is difficult for the sun's light to be reflected.

When we see the sky on Earth as bright, it is because of the presence of air, which reflects and scatters sunlight because when the light hits an object, it forms a diffuse reflection from multiple anglesBut there is no air in space, and light cannot be scattered, so even if the sun is right in front of you, it is still dark.

Many people like sunny days very much, travel or something is very good, especially when the sun shines on the body, warm and very comfortable, you must know that space is a very mysterious space, people have a lot of questions about space, for example, I am very envious of those astronauts, they have the opportunity to go to space to see this magical world,There are many people who wonder why there is a sun in space, but it is still dark. There is a lot of confusion about this question.

You know, in fact, space and the brightness of the sun have nothing to do with each otherIn the vast space, in fact, the sun is only an insignificant member, the sunlight it emits is very large for us, but for space, it is simply not enough to illuminate the entire space, it is as insignificant as the stars, and in the comparison of the entire vast universe, it is very small, it can be said that it cannot be seen.

I believe that everyone used to read books,In fact, what our eyes see is not what the light makes me see, but what we see through the reflection of lightThat is to say, if we want to see the sun's light, it is far from enough, if we want to see the light with our naked eyes, we need projectiles, otherwise there is no reflection in front of our eyes, it is still pitch black, which is why there is light in space, but we still feel that it is dark.

On our planet, as long as it is daytime, the half of the sun that can be seen will be brightIn the universe, the ** taken from astronauts or satellites is also pitch black, and that is also because there are no reflectors.

Space has nothing to do with the Sun, which is just a tiny, tiny planet in space.

Why is there a sun in space, but it's still dark? The Sun is a very small existence in relation to space.

But for space, it is simply not enough to illuminate the whole of space, it is as insignificant as a star.

Space is so big, the sun can't shine on it.

If we want to see light with our naked eyes, we need projectiles, otherwise it will still be pitch black without reflections in front of our eyes.

Maybe it's not even noticeable to our naked eyes.

Because the Earth's periphery is covered with an atmosphere, the sun's rays are refracted and appear blue.

Sunlight is a combination of 7 monochromatic lights. When the sunlight passes through the atmosphere, the blue-violet light is scattered, and the human eye is not sensitive to purple, so we see blue.

Because the earth is blue, the earth is round, the water vapor in the sky reflects the color of the sea, and the natural sky is blue, but except for the rain, sandstorms, and haze weather.

When sunlight passes through the atmosphere, gas molecules absorb all the sunlight, but because the blue molecules in sunlight have shorter wavelengths, water molecules can absorb these shorter wavelengths faster, so the sky we see is blue.

But the universe is different, the universe is a vacuum environment, and there is no air. The light emitted by stars does not have the water molecules in the air to give people a different visual effect, so the universe will look black.

Why is the sky blue?

Unless there is external interference, light travels in a straight line. When light travels through the air, it inevitably encounters gas molecules and other particles in the air. These particles absorb, reflect, and scatter light, and it is these physical processes that make the sky blue on a clear day.

Cosmic color: Milk coffee color.

Recently, two American scientists announced that the exact color of the universe should be the hue formed by milk and coffee.

According to local ** reports, cosmic color refers to the light emitted by all luminous bodies.

This? Gracebrook and Bowdry of Hopkins University announced at a meeting of the American Astronomical Society in January that they had analyzed the spectra emitted by 200,000 galaxies and found that the universe appeared a slightly greener color than pale turquoise.

Later research found that they were inaccurate in their judgment of the colors of the universe. Glaissbrook and Bowdry re-analyzed and revised the cosmic color to a cream-like beige. However, they did not think this statement was accurate enough, and invited people from all walks of life to come and name the colors of the universe.

According to reports, a total of more than 300 people sent emails, suggesting a variety of suggestions, including "big **beige", "galaxy gold", "cosmic earth color", "astronomical almond color" and so on. In the end, the café au lait color stood out as the winner.

The longer wavelength of red, orange and yellow light has a strong transmission ability, and they can pass through atmospheric molecules and particles, keep moving in the original direction, and are rarely scattered by air molecules. For the lower air molecules, it is mainly the blue light that is scattered, so that the sky is blue. The blue of the sky can only be seen at low altitudes, and as the altitude increases, as the air becomes thinner and thinner, the number of atmospheric molecules decreases sharply, the brilliance scattered by the molecules gradually weakens, and the brightness of the sky becomes darker and darker, and at an altitude of more than 20,000 meters, the scattering effect is several.