However, an astronomical team from Italy announced that they had discovered the "cosmic wall" at a distance of 654.38+0.5 billion light years from the Earth. The news caused everyone to discuss. After all, people have fantasized about the boundary of the universe for countless times, but now they tell us that the "cosmic wall" is only 65.438+0.5 billion light years away from us, which really subverts our traditional cognition. Is the theory of the universe in the eyes of the public going to be rewritten? If you want to understand the wall of the universe, you have to start with the birth of the universe.
A widely accepted theory is the Big Bang Cosmology, that is, the universe originated from an explosion about 654.38+0.4 billion years ago. Before the explosion, there was no such concept as time and space, only a singularity with infinitely small volume and infinite density.
When the explosion just happened, the temperature exceeded 1032 degrees, which was enough to drive the expansion of the universe. Because the energy generated by the explosion is so huge, all activities occur to the limit in a short time. At first, the explosion produced various particles, such as electrons and photons. Due to the confusion at this time, they have not found a suitable matching pattern. It was not until the first 10 second after the explosion that the whole universe cooled to 3 billion degrees. At this time, electrons, protons and neutrons have found a suitable mode-atomic structure.
In this way, the earliest atom in the universe was born, which is the hydrogen atom. Subsequently, the hydrogen atom carried out the first nuclear fusion in the universe, resulting in a stable helium atom. These two kinds of atoms are the most abundant in the universe. They formed the earliest molecules and became the earliest gases, which laid the foundation for the birth of stars later. 300,000 years after BIGBANG, the temperature dropped to 3,000 degrees, nebulae began to form, and star systems gradually appeared. The whole universe began to take on its original shape. About 654.38 billion years after the Big Bang, our solar system was formed.
Theoretically, the universe has boundaries, because starting from the singularity is like blowing a balloon. However, the universe began to expand after the explosion. According to the current human observation data, the diameter of the universe has reached 96 billion light years. The number of stars in it has exceeded 1000 billion, and the attraction between them will constrain the expansion of the universe. However, it is observed that the expansion of the universe has never stopped. In other words, there is a force in the universe that overcomes the huge gravity and makes the whole universe always have an expanding force.
As a huge expanding space-time, the universe naturally cannot expand at a uniform speed, just like blowing a balloon, it blows fast at first and expands fast; Then blow slowly, and the expansion speed slows down. So someone put forward the skyrocketing cosmology, that is, in a short time after the Big Bang, the universe expanded very fast and its volume increased geometrically. This initial stage is the skyrocketing universe. In this process, many bubbles will be produced in the universe.
Astronomers assume that when the universe soars, it's like cooking porridge. At a certain limit, the porridge is boiled. At this time, bubbles will appear inside, because the density of bubbles is smaller than that of porridge, and eventually they will float to the surface and burst. Similarly, in the bubble universe, when it soars to a certain extent, some stars will spit out a lot of gas and wrap themselves and surrounding galaxies to form bubbles. These bubble universes are estimated to be 8 billion light-years or more in diameter. In other words, our solar system is actually in the middle of such a bubble
Then these bubbles must have boundaries. If you want to go from one bubble to another, you must cross a boundary. This bubble wall is probably a wall in the universe that prevents matter from passing through.
It is speculated that our solar system is in a cosmic bubble, the diameter of which is very large, reaching 65.438+0.5 billion light years, and the cosmic wall is the bubble wall. But the discoverers from Italy said that their so-called cosmic wall is not an obstacle in the traditional sense, but an empty interval, the so-called cosmic hole.
There are many "holes" in the universe, such as black holes that devour everything and even light can't escape; A wormhole that connects two spaces and can freely shuttle; Since there is a black hole that devours everything, there will naturally be a white hole that pushes everything out (just staying in the hypothesis). The universe is empty. What kind of hole is it?
It turns out that not every corner of the universe is full of stars, and their distribution is extremely uneven. All stars maintain some motion by gravity. Gravity is related to the mass of a star. Some small stars will be pulled to a certain area because of gravity, which will inevitably lead to some spaces in the universe where there are no stars, because they are all attracted by other stars with great gravity. These blank areas are cosmic holes.
The Italian astronomical team thinks that the cosmic hole will be a wall, because the hole and the black hole exist together. There is a galactic black hole in the center of the Milky Way where the solar system is located. For it, any species near it will be swallowed up, which naturally leads to no matter and nothing around the black hole.
If something approaches, it will be swallowed up by a black hole, so if you want to cross this hole, you will inevitably encounter a black hole. So can this passing object escape from the black hole? Nature is impossible, so the team thinks that this space seems to have no stars, but matter can never reach it.
The so-called cosmic wall is not the boundary of the universe, but an empty area without stars. Because it is difficult to cross it and there are unknown risks, the Italian astronomical team named it "the wall of the universe". Their paper on the wall of the universe was published in New Science magazine, and there was no authoritative certification at all, and the theory of the wall of the universe was not strictly defined. At present, major astronomers are "scuffling" with it.
If you want to know whether our universe has boundaries, you have to assume that there are other universes besides this one. According to the cycle of stars, some scientists believe that the universe originated from an explosion, but it is not an explosion as it is now academically said. Just like a supernova explosion, the old universe will explode itself before it dies, but unlike the nebula formed by stars, the death of the old universe is likely to be a contraction, which will shrink all its substances into a point.
At this time, my density reached its maximum. At this time, this point ushered in a new life, it will explode and form a new universe. In other words, our present universe was born from another aging universe, and there are other universes outside our universe, which form a parallel relationship with us.
We all know that there are all kinds of gravity in the universe. Sometimes, a planet will be influenced by the gravity of other galaxies besides its own star system. Parallelism of parallel universes means that universes do not interfere with each other. We can imagine each universe as a separate floor, and each floor has its own work. The reason why these floors do not interfere with each other is that there are floors separated from each other, and each floor only focuses on its own. If you want to know what happened on the upper floor or the lower floor, you can either go downstairs and check for yourself, or break the floor between floors.
Therefore, this means that there is a boundary layer between parallel universes, so that each universe will not interfere with other universes. Maybe this is the real wall of the universe. Without this wall, the universe may interfere with each other, leading to chaos and distortion of time and space.
Since ancient times, many scientists have wanted to know about the situation before the birth of the universe. Some people think that nothing happened before the big bang, and the big bang was the beginning of everything. But some people think that everything that happens in the universe is actually a replica of the universe itself.
From the earth's point of view, our creatures have been experiencing the cycle of life. Judging from the stars, if there are no immortal stars, they will be born again, mature and die. Looking at the Milky Way, the black hole with the silver heart indicates that it has been updated. In this way, the universe will not exist forever, and there may be other universes before it.
There has always been a misunderstanding when people explore the universe, that is, all observation and research are based on the earth. Both optical astronomical telescopes and radio telescopes explore the universe radially from the earth.
We know that in the past, the church always thought that the earth was the center of the universe, and even the sun revolved around it. Later, through the efforts of countless scientists, it was finally changed to the conclusion that the earth is centered on the sun. But human beings don't know the position of the earth in the universe at present, so all research can only assume that the earth is the center.
Of course, this setting is purely because of helplessness. The universe is so big that the earth is nothing in it. With our current technology, it is impossible to determine the position of the earth. This is completely different from the geocentric theory in the Middle Ages. Geocentric theory is used to rule people's thoughts, but now it is necessary to establish research coordinates, so it is used.
Although the Italian team's space wall has not been recognized by authoritative organizations, it has introduced a brand-new concept. If such a cosmic hole really exists at a distance of 0/50 light-years from the Earth/Kloc-,it means that the solar system and a gravitational star are in the same space, perhaps the same bubble universe. This star absorbs all other stars in an area, leaving an empty area. This means that anything that enters space cannot escape.
This not only aroused people's curiosity, but also made people feel powerless. Facing our own solar system, we haven't found the boundary yet, and it seems impossible to find the edge of the universe. We don't know much about the whole universe. Maybe a lot of things will be beyond human imagination after deep understanding.
Regrettably, this "space wall" of 65.438+0.5 billion light years failed to rewrite the astronomical theory, but it strengthened the determination of mankind to continue exploring the universe. Whether there is a wall or not, the pace of human marching into space is still very difficult. In the eyes of the universe of 654.38+0.4 billion years, human beings are still very immature. Kardashev, a scientist in the former Soviet Union, once imagined three levels of cosmic civilization. According to the algorithm of changing one level into one point, the current score of human beings is 0.7 1, which means that it has not reached the first level of civilization.
We are still trapped in the solar system and can't get out, let alone reach the hole of 654.38+0.5 billion light years to prove whether it is really a cosmic wall. For the future, mankind has always believed that we will leave the earth and the solar system one day to find another habitable planet. But with the deepening of exploration, there are more and more unsolved mysteries in the universe, and some of them have become unsolved mysteries.
Man has to admit the infinity of the universe. Of course, human beings also have their own infinity. We have unlimited imagination and creativity to face the unknown universe. Human civilization may be a lot naive in front of the universe, but after inheritance, it is already developing to maturity, looking forward to the day when human beings go further.