What is cosmic dust and will there be cosmic dust on Earth?

According to the latest astronomical theories, cosmic dust is a solid dust composed of many tiny particles, ranging in size from a few microns to hundreds of microns. Since the beginning of the universe, cosmic dust has been scattered in the universe. Its composition includes elements such as silicates and carbon, and some come from comets, asteroids and other stars.

Humans live on the surface of the earth and are constantly discovering dust particles from outside the earthIn addition to the various types of dust that we see on a daily basis, there is also a ubiquitous type of dust, that is, cosmic dust from outer space.

When it is systematically collected and studied, we refer to these solid particles from outside the Earth as cosmic dust. Scientists speculate that over the past billion years, this cosmic dust has come mainly from meteors burning in the atmosphere, in fact, they are mainly interplanetary dust, comet tail material and micrometeorites. Its size ranges from a few microns to several hundred microns.

Cosmic dust has a great impact on the birth of a celestial body, for example, the cosmic dust produced after the collapse of a star may collide head-on with a forming star after a long cosmic journey, so it will cycle into a new star. In the solar system, the rings of planets such as Jupiter, Saturn, and Uranus, even when the planets were first formed, the fragmented cosmic dust failed to merge into the main body of the planet, but they could not get rid of the gravitational pull of the planets, thus producing broken matter around the planet.

Within the solar system, there is similar cosmic dust, which is most likely due to comets. Outside the visible range of the solar system, there may be a comet shell composed of a large number of comets, some of which will continue to fall in the direction of the sun due to the gravitational pull of nearby stars. Whenever a comet comes close to the Sun, some of the material in the comet melts due to heat, which frees the tiny solid particles and scatters them in the form of a long tail in space.

In the history of the solar system, countless comets have disintegrated like this, and because of this, the inner circle of the solar system is scattered everywhere with cosmic dust, and billions of such cosmic dust particles fall on the earth every day.

Cosmic dust is a solid form of dust made up of tiny particles. There is cosmic dust on the earth, and the dust found by humans from outside the earth is cosmic dust.

After the star** burns, it produces cosmic dust, and billions of such burning powders fall on the earth every day.

We all know that there are eight planets in the solar system. The Moon, as the Earth's only natural satellite, can be said to be very close to us. But you know what?

One Earth is the size of 49 moons. But compared to the other seven planets in the solar system, the Earth is much more "petite". Because one Saturn is equivalent to 830 Earths, and one Jupiter is the size of 1,300 Earths!

And the core of the solar system, the sun, is equivalent to 1.3 million Earths. However, despite the fact that the Sun is so much larger than the Earth, the Sun is really a grain of sand compared to the largest stars at present.

At present, the largest star in the Milky Way is UY in the constellation Shield, which is 21 billion times the volume of the Sun, and even the second largest Star VY Canis Major, which is at least 8 billion times the size of the Sun! If UY in Shield is placed in the Sun's position, its photosphere will at least engulf Jupiter's orbit and may be close to Saturn's orbit, which shows how large it is.

But even the largest star in the constellation Shield, UY, is just an insignificant point in the Milky Way. In the Milky Way, there are about 150 billion galaxies like the solar system, and about 300 billion galaxies larger than the solar system. From the currently observable universe alone, scientists have found about two trillion galaxies that resemble the Milky Way, and the universe is still in the process of expanding.

In the solar system, the mass of the sun and the planet accounts for the total mass of the solar system, but such a mass is only an insignificant speck of dust in the Milky Way. And the earth only occupies the entire solar system, not even a drop in the bucket, let alone the Milky Way, which is already an insignificant speck of dust in the solar system.

Summary. There are several theories about the origin of dust, the first is that it comes from the ** of the dead star, after which a lot of material is formed, thus forming dust. The second theory is that the dust is caused by the garbage in space.

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There are several theories about the origin of dust, the first is that it comes from the ** of the dead star, after which a lot of material is formed, thus forming dust. The second theory is that the dust is caused by the garbage in space.

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Analysis: Cosmic dust.

It refers to the particles of rock and metal that float in the universe. Between the vast and empty universe, except for all kinds of stars, large planets, comets, asteroids, and other celestial bodies, there is not a complete vacuum. In fact, there is a large amount of cosmic dust in the universe, which may seem inconspicuous, but can have a non-negligible impact on our lives.

Physically, cosmic dust is no different from the composition of the Earth. However, for various reasons, the dust did not coalesce into a single star, but instead suspended in the form of particles in the universe. Under the appropriate gravitational effect, these dusts are likely to gather together relatively densely, and the rock bucket brother is cloud-like, and in the lens of astronomical telescopes, it often appears brilliant and colorful, so people vividly call it "nebula".

The ** of cosmic dust has always been a difficult mystery to solve. One theory is that cosmic dust** is more than ordinary stars with relatively low temperatures and slow combustion processes. The dust is released by the solar wind and then dispersed into the rough space.

However, based on studies of the density of matter contained in the solar wind, there are also some scientists who believe that the solar wind is not capable of providing a sufficient density of cosmic dust. Therefore, another speculation is that these tiny dust particles are likely to come from a supernova explosion. According to British scientists' observations of Cassiopeia, the youngest supernova in the Milky Way, it was found that there is a large amount of cold dust in the area where the remnants of the eruption are located, which may weigh four times the weight of the Sun.

These scientists believe that if all supernova eruptions erupt outward at this scale, they would be able to reach the amount of cosmic dust that the universe currently has. Therefore, compared to the ordinary stellar solar wind, the supernova explosion may be the ** of cosmic dust.

This beautiful-looking dust has a fairly direct impact on our lives. For example, according to statistics, cosmic dust is the fourth largest dust on Earth**, and these dust have a significant impact on the Earth's environment and climate. Every hour, about a ton of cosmic dust enters the Earth, and just one cloud of dust revolving around the Sun at a speed of 100,000 kilometers per hour brings 30 million kilograms of dust to the Earth every year.

That's a huge number. In addition, researchers in the United States have developed computer programs that can simulate the impact of cosmic dust on the Earth over a period of 1.2 million years, which is used to study the effects of cosmic dust on the Earth over a long period of time. The results of the simulations show that the impact of cosmic dust on the Earth peaks once every 100,000 years.

And the dust did not disappear gradually, but gathered on the earth, which is likely to be the source of natural disasters in the past. Paleontologists have found new evidence that individual species of plants and animals did not go extinct all at once, but gradually and slowly, most likely due to the slow action of cosmic dust.

Cosmic dust is an important extraterrestrial substance used by human beings to study various information in space. Because it is so small, like a wheat, humans have never seen it fall before their eyes. However, the amount of this extraterrestrial material is staggering.

According to the research and testing of relevant experts, the annual precipitation of cosmic dust with a particle size greater than 60 microns is about 23,430 tons. What is particularly amazing is that the structure of cosmic dust chondrites is the same as that of the Earth, with a triple structure of core and mantle crust, and the core radius of each chondrite is greater than the thickness of the mantle and the thickness of the crust, and the average thickness percentage between them is: 46 and.

Its ratio is similar to the percentage between the thickness of the Earth's core, mantle, and shell. Scientists are intrigued by this striking proximity, as the tiny speck of cosmic dust resembles the structure of the Earth. Cosmic dust, there are roughly three types:

One is black or brownish black in appearance, and the surface is bright and dazzling, very much like a shiny small steel ball; The second is dark brown or slightly grayish-white spherical, ellipsoidal, rounded small particles, the main components are oxygen, silicon, magnesium, calcium, aluminum, etc.; The third type is some colorless or pale green glass spheres, the main component is silicon dioxide, and also contains a small amount of divalent oxide. This cosmic dust is part of the interstellar dust before it falls on Earth. As they reflect the sun's rays, a blurred band of zodiacal light is formed.

Over millions of years, dust particles have been rotating towards the Sun and replenishing from the asteroid belt. As for the cause of these cosmic dusts, researchers at the University of Bath in the United Kingdom believe that they are sparks thrown by asteroids when the cosmic space between Mars and Jupiter collides with each other, and most of them fall to the deep seabed. The chemical composition of these small particles is very different from that of deep-sea sediments and has a unique shape.

In 1872, the British oceanographic research ship "Challenger" was on an expedition and first picked up this strange small particle from the deep seabed; The United States in 1950, Japan in 1967, and China in 1978 all collected these small particles at the bottom of the ocean. In order to study their composition, scientists from various countries have carried out a lot of work, comparing them with the cosmic dust collected at high altitude by high-altitude balloons, rockets, artificial satellites, and other aircraft, and found that the two are identical, thus determining that these small particles are cosmic dust from the earth. As for the green vitreous dust particles, some scientists believe that they come from the moon and are eruptions of lunar volcanism, and their properties are exactly the same as those of the vitreous material found in lunar soil.

The study of cosmic dust in the depths of the ocean is of great significance for the origin and evolution of the earth, the solar system and the Milky Way, however, there are still many mysteries of cosmic dust to be solved.

Summary. Interstellar dust (interstellar dust) refers to solid particles in space with a diameter of about 10-5 centimeters, including ice, graphite, silicate, etc., which are dispersed in interstellar gas, and the mass accounts for about 10% of interstellar gas.

The interstellar matter in the Milky Way (including interstellar dust) is mainly distributed in the spiral arms, accounting for 10% of the total mass of the Milky Way, and the density is about one hydrogen atom per cubic centimeter, which is actually very low and cannot be reached in an artificial vacuum.

Is there any dust in the universe?

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It stands to reason that there is, but it is relatively small, because space is a vacuum, which does not mean that it has no dust, but that the gas is close to nothing, but there are also some galaxies that are full of gas and dust. So there will be a certain amount of dust on the surface of the spaceship, but not much.

Is cosmic dust interstellar dust?

Interstellar dust (interstellar dust) refers to solid particles in space with a diameter of about 10-5 centimeters, including ice, graphite, silicate, etc., which are dispersed in interstellar gas, and the mass accounts for about 10% of interstellar gas. The interstellar matter in the Milky Way (including interstellar dust) is mainly distributed in the spiral arms, accounting for 10% of the total mass of the Milky Way, and the density is about one hydrogen atom per cubic centimeter, which is actually very low and cannot be reached in an artificial vacuum.

I know if I'm talking about interstellar dust or not.

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