Is there dark matter in the universe, and if so, how many?

Theoretically, there is as much antimatter as there is positive matter.

3. The microscopic quanta of the whole universe will change. The last point is that if dark matter disappears, there will be a significant change in the microscopic quantum of the world and even the entire universe. After all, the quantum universe is something we can't use with the naked eye, but the components of it, dark matter, are very important.

Everyone has heard that there are nine planets in the solar system we live in, but in 06 Pluto was defined as a dwarf planet, so it was ranked outside the "nine planets", so now our solar system is eight planets.

Uranus among the major planets in the solar system is an outlier, such as the Earth, Venus, Jupiter and several others have their own orbits, and these trajectories are regular, but only Uranus, its trajectory can be described as weird, it never runs according to a fixed orbit, people simply can't ** its next trajectory, there will always be a trace of deviation.

The astronomers who observed this phenomenon at the beginning thought it was incredible, and it stands to reason that such a thing should not happen, so some people speculated whether there was a planet that was not discovered by human beings affecting Uranus, and then according to the irregular trajectory of Uranus, the astronomical telescope was adjusted to the position where they might have unknown planets, and sure enough, another planet was discovered, which is Neptune.

It is based on this discovery that people begin to realize that there are many things that you don't notice, but they are real. In 1922, there was an astrophyser Capttan, who deduced from the observation of the movement of celestial bodies in the universe that there was invisible matter between the celestial bodies, which was the first time that dark matter was proposed, although it was not proved to exist, but it also provided a direction for subsequent research.

In the following decades, a number of astronomers and astrophysicists have studied whether there is dark matter in the universe, through the study of various galaxy clusters in the universe, and through the very high-precision spectral measurement technology to measure the speed and distance of the stars at the edge of the galaxy cluster, it is found that the speed of those stars is constant, and through Newton's law of gravitation, those stars should move slower and slower because they are far away from the inner core of the galaxy and affected by the gravitational pull of the inner part of the galaxy. It can be inferred that the gravitational pull of the galaxy's core not only binds the stars in the galaxy, but also absorbs a lot of invisible matter around the galaxy's core.

With the gradual deepening of research, in the 1980s, there were many observational data supporting the existence of dark matter, and through the analysis of some observational data, it was found that the composition of dark matter is not any kind of particle that we know now, so many particle physicists now try to analyze the particle properties of dark matter through various high-tech means.

China's research on dark matter has not stopped, and it was built at the foot of Jinping Mountain in Sichuan, China's first extremely deep underground laboratory, which has a vertical rock thickness of 2,400 meters, which is also the deepest underground laboratory in the world.

Why should the lab be built deep underground? That's because above the surface, there are a large number of cosmic rays in our daily living environment, and this cosmic ray is the most feared thing by particle physicists. So a "clean" environment has a great impact on the observation of dark matter.

Probably not much of an impact on the universe because the mass of dark matter is very small, and even if it disappears, we don't notice anything abnormal.

Dark matter hasn't been proven yet, has it? At present, it is still speculation, it is just a speculation that it was created to use the chain to calculate the inconsistency between the calculation and the results of the Guanfan Imperial Measurement, who knows what dark matter is.

It has now been found that the mass of the universe is much greater than the mass of visible matter, and those that exceed the mass are considered dark matter and dark energy.

Astronomers believe that there is dark matter in the universe by observing changes in the orbits of galaxies and changes in the direction of light.

The total mass of dark matter is twice that of ordinary matter, accounting for 1 4 of the energy density of the universe, and more importantly, dark matter dominates the formation of the structure of the universe. The nature of dark matter is still a mystery, but if it is assumed to be a weakly interacting subatomic particle, then the resulting large-scale structure of the universe is consistent with observations. However, recent analyses of the structure of galaxies and subgalaxies have shown discrepancies between this assumption and observations, which provide a variety of possible theories of dark matter.

Through the study of the density, distribution, evolution and environment of small-scale structures, these potential dark matter models can be distinguished, bringing new dawn to the study of the nature of dark matter.

At present, it is believed that there is more dark energy in the universe, followed by dark matter. It can be seen that there is not much substance.

Dark matter does not emit photons, does not absorb or reflect photons, and does not participate in electromagnetic interactions, so it cannot be perceived by current means of observation, but can only be perceived through the effects of gravity. Dark matter produces the force that "pulls" galaxies and galaxy clusters together. Without dark matter, galaxies and galaxy clusters would not exist.

In addition, there is dark energy in the universe. Dark energy is the driving force behind the continuous expansion of the universe.

It is generally believed that only about 5% of the total matter and energy in the universe are visible in the universe (and about 95% of the other 95% are dark matter and dark energy.

The current popular theory is that visible matter accounts for the total mass energy of the universe. Dark matter accounts for and dark energy accounts for it.

Dark energy is the most.