In the past, human perception of the world has been greatly limited.
In ancient times, whether in the East or the West, people did not have advanced scientific and technological means, and could only stand on their feet or observe the sky from a high place, watching the sun rise and sunset, the moon lacking the moon full, and other speckled stars that were not dazzling.
Although the ancients discovered some unique astronomical phenomena, such as solar eclipses, supernova explosions, etc., they lacked theoretical knowledge and did not know what these represented, but instead gave these astronomical changes in the universe a mysterious omen in the context of the times.
Finally, after Galileo invented the astronomical telescope, human beings can finally see what is above their heads, observe the changes of distant planets, feel the limitations of breaking the limitations of human flesh, and master the superpower of "clairvoyance" like "gods".
In modern society, our science and technology has undergone earth-shaking changes, and various optical telescopes, radio telescopes and other astronomical equipment with various functions are used in the observation of the universe, which also brings us richer and more fascinating space mysteries.
In ancient times, people thought that the world was centered on "me" and that the earth was the midpoint of all things, but of course, what we know today is not correct, and even the earth is actually just an incomparably small terrestrial planet in the solar system.
Looking around, the universe is endless, which is the existence that human beings cannot reach the end even if they have exhausted their life's efforts, with generations, even dozens and hundreds of generations.
According to the research data under modern technology, we found that the galaxies in the universe have certain arrangements, are these arrangements regular, or randomly formed? There is no hurry, let's take a look.
Since we talk about the arrangement of galaxies in the universe, we naturally first look at what kind of arrangement it looks like.
Our solar system is located in the Milky Way, the Milky Way is like a spiral, stretching out four huge main spiral arms, and other relatively small spiral arms are also present in the Milky Way, such as the solar system is located on the inside of the Orion arm, sandwiched between the Immortal Arm and the Centaur-Bottom Arm.
With the development of science and technology, scientists have gradually deepened their understanding of the universe and found that the Milky Way is a relatively large group of stars, in which tens of billions of stars are gathered and rotated around the center of the Milky Way.
At the same time, scientists have also found that there are many other galaxies around the Milky Way, such as the Closest Andromeda Galaxy to the Milky Way, which is 2.54 million light-years away from Earth, looks like a spindle on Earth, has a diameter of 220,000 light-years, and looks like the Milky Way.
It has been observed that the Andromeda Galaxy may have about 1,000 billion stars, far more than the stars in the Milky Way, and should have twice the mass of the latter. The Andromeda galaxy is even moving at a speed of 300 kilometers per second to the Milky Way galaxy, and will collide with us in the next 3 billion years, thus joining forces into a new galaxy.
Of course, the Milky Way is not only surrounded by the Andromeda Galaxy, but also the Magellanic Nebula, the Triangle Galaxy, the M 32, and so on, which are about 50 galaxies that form a local galaxy group.
In fact, the Milky Way and the Andromeda Galaxy happen to be the two most massive galaxies in the Local Galaxy Group, and the galaxies of the Local Galaxy Group are sparsely distributed, and they do not converge towards the center like the planets of the Solar System around the Sun, but become a subgroup of threes and twos, like the Earth-Moon satellite system, such as some galaxies around the Milky Way.
Around the local group, there are about 100 galaxy groups and nebulae that together form a local supercluster, with the Virgo cluster of more than 1300 galaxies at its center, also known as the Virgo supercluster.
The other galaxy clusters are moving around the central Virgo Cluster, and the Local Cluster we are in is even only a "small character" at the very edge of the Virgo Cluster, and is still moving away from the position of the Virgo Cluster.
Beyond this supercluster, there is a new supercluster, that is, it has at least 300 to 500 galaxy clusters and galaxy groups that have been discovered under the existing technology of mankind, forming a spider web-like cosmic web, of which there are about 100,000 galaxies.
In this supercluster, all galaxies move toward a gravitational anomaly near the center of its weight, at a speed of about 700 kilometers per second, very fast, and a place so strange that it can affect places hundreds of millions of light-years away, including the Milky Way.
Beyond the Raniakea supercluster, it forms a complex with 5 other superclusters, with about 60 clusters.
The Virgo supercluster is even only 0.01 of the mass of this complex, which is 1 billion light-years long and is called the Pisces-Cetus supercluster complex, which is also the largest fibrous structural unit in the universe, and the largest unit is the universe.
In fact, as early as the beginning, scientists discovered that there are galaxies large and small beyond the Milky Way, all of which are very distant distances between them, and some form a galaxy cluster that envelops thousands of galaxies.
These galaxy clusters also seem to have nothing in common, some are large, some are extremely small, and some galaxies are lonely, like lost children "wandering" alone in space.
These data seem to be that the universe does not seem to have any regular arrangement, like a random combination.
But in the 1970s, scientists were still observing the mysterious universe, gradually deepening the study of galaxies, and finally discovering that there were large-scale fiber structures in the universe, that is, units composed of many superclusters similar to the Pisces-Cetus supercluster complex.
Galaxies gather around these "fibers", galaxy clusters exist in the intersection of fibers, and in addition to this, there are structures similar to "giant walls" in the universe, forming a strip-like distribution pattern.
There is still space between these skeleton-like fibrous structures, like "hollows", in which there are only a few galaxies, or even no galaxies at all.
According to this form, scientists call it a "cosmic web", such a structural model almost subverts people's previous understanding of the universe, and is not consistent with the cosmological principles we have summarized, and human research on the universe is still only on the surface.
Therefore, some scientists have proposed that perhaps the universe is a fractal, and the arrangement of galaxies is its analytical structure.
What is a fractal? This is actually a mathematical term, that is, a subject shape can be subdivided into infinitely smaller shapes approximately the reduced size of the subject. Just like snowflakes, enlarge a part of the snowflake, we will see a miniature snowflake shape similar to the snowflake as a whole, this snowflake is not a special case, fractals in our daily life are everywhere.
Therefore, the scientist believes that if the universe is studied in enough detail, then we can discover its fractal structure.
However, after simulations, later scientists found that the universe is not a fractal structure, but it is more like a fractal to some extent, and there are still galaxies in those fibrous holes, but they belong to dwarf galaxies with relatively dark light, and they also contain their own "cosmic net" structure.
Originally scientists thought that the universe might be homogeneous and isotropic, meaning that the universe measured values were exactly the same no matter which direction it looked in.
After discovering that galaxies will form galaxy clusters, galaxy clusters will form clusters of galaxies with each other, etc., and have been formed into fibrous complex structures, scientists believe that perhaps the distribution of matter in the universe is in a balanced state, like the ocean, the ripples swing greatly up close, but from a distance, it is almost impossible to find anything, but smooth like a mirror.
After the development of science and technology, human beings have found that even if observed on such a huge scale as hundreds of millions of light years, the distribution of galaxies in the universe is still not uniform, until billions of light years, so that on a more extensive scale, even galaxy distribution can be seen.
Therefore, some scientists believe that from a large scale, the distribution of cosmic galaxies is indeed uniform.
But some scientists have questioned this, because this observation is only an observational data analysis of 30 million galaxies, which is not representative, or even only 5% of the size of the observable universe, and it may be that the distribution of these 30 million galaxies is relatively uniform, and it cannot be obtained that the galaxies in the universe are evenly distributed.
This is actually because the development of human science and technology is still relatively limited, these conclusions are even scientists in the up to 7 years of continuous monitoring to reach, want to really observe the entire universe, get more real data, may have to wait a long time.
But in any case, based on the above analysis, we can find that the universe is not fractal, but the existence of fractals is found in many places in the universe.
At the same time, although it is not more accurate to conclude whether the universe is uniform, it can still be summed up that the arrangement of galaxies in the universe is a seemingly random, but there is a certain degree of law.
Of course, if you want to know the true secrets of the universe, it may be just an expectation at this stage, and with the development of time, at some point in the future, we with more advanced technology will also be able to explore the truth.
In fact, known matter between galaxies and galaxies has not yet been able to connect them into a fine cluster of galaxies, and scientists believe that it may be dark matter silently supporting their structure.
At present, human beings have not directly observed the existence of dark matter, can only carry out indirect analysis, these dark matter occupies most of the mass of the universe, perhaps when we can really find the traces of dark matter one day, we will not be far from the truth of the universe.