In the age of the size of the universe, the traditional fairytale is not less in the era. Sometimes the story of the earth in the elephant's head, sometimes on the back of a tortoise, or the immersion of great waters, was the story of ancient people. The Greeks thought that there was a cave at the end of the sky on the head, where Zeus's lusty horses were located. In the morning the horses ran from one end of the sky to the other end so the world was filled with light. Even a few centuries ago, the idea of the universe was the idea of the universe, the solar system. But whenever people knew that the solar system was actually a small part of the universe, the question began to arise-what could the universe be finite? If that is the end of the universe? Two questions come together at one point: "What exactly is the size of the universe?"
Before answering this question, we should first know the curvature of the floor (positive, negative or flat) and some specific features of the universe, such as how its components are connected to each other. Curvature of the spherical surface is the positive curvature. The inner side of a wheel full of pumps is a negative curvature. Since we do not know the structure of the universe, therefore, we can assume that many possible shapes - spherical, cylindrical shape, cube, or indeterminate formation of a gauze shape or a different crank and twisted shape, or any indefinite shape that has no opposite floor.
At first we think of three shapes we know. These three shapes are flat shapes, spherical shapes and hyperbolic shapes.
Before understanding the features of the floor, it is necessary to get acquainted with a particular type of geometry. This is Riemann's Geometry. We generally discuss the geometric shapes, such as triangle, quadrilateral, circle or straight line, all of which are discussed, subject to flat areas. It is actually Euclidean geometry. But if the field is spherical or crooked? This is the honor of the mathematician Gauss's worthy student Reyman!
Rayman first proved mathematically that the sum of the three corners of the triangle is more than the two atoms on the spherical surface and in the bracketed area less than two angled bones. And he also said that the minimum distance between the two spheres in the sphere or the curved surface would be a curve. The crack may take, because in the current geometry we know the minimum distance of the two points is the straight line. But imagine the straight line, it moves to flat areas, so it becomes under Euclidean geometry! From Reyman geometry, it is also seen that, if two parallel lines of the flat field are taken into the sphere, then they will intersect themselves at a time. If taken again, they will move away from each other.
Now let's see how the universe is in a shape. We all know that every particle in the universe is attracting each other. As a matter of time, all the things have to be unified again. Now if the universe is flat, then in that case the universe will expand flat to a certain extent and at one point it will return to a point again.
But there is a question in that case. In order to be the plane of the universe, energy needs to be one in the whole universe. For example, if two different magneties of different energy are kept close to the iron powder spread over the paper, then it can be seen that the iron powders that are arranged under are not flat. Density of all the objects in the universe is not the same, so their energy density also varies. The density parameter of the universe has a nice name - Density Parameter In the case of flat land, its value is 1, that is, if one takes the ideal, then all else will be the same. But this is not true, so it can be said that the universe is flat.
Now let's say 'the universe is spherical'. Naturally, we see that all the fluids and gases are trying to be spherical. Because of this, the attraction of the force between the molecules in the fluid or gus can be more than the necessary force to spread them. In that sense, the universe is about to be finite but we can not find any end to it. For example, in a football, we can not say which point at its starting point and ending at some point. But the question remains here. We know that the universe is still expanding and this expansion rate is increasing steadily. But if the universe is spherical then it is not possible to increase the rate of expansion, because it will be the sphere beyond crossing this extension! From Rayman's geometry, any force on the positive curvature of any force is more efficient in the center, so the value of the Density Parameter is greater than 1. If there is no way to reduce the expansion of the universe at one time and then to start shrinking, then increasing the level of expansion is not possible.
So the last one remains the same, the negative curvature of the field, that is, the hyperbolic space. The value of the Density Parameter at Hyperbolic Space is between 0 and 1. So, it seems that 'the energy density is not the same everywhere in the universe' - this theory is only possible in hyperbolic spaces. Furthermore, from Rayman Geometry it can be seen that, in the case of only negative curvature, the distance of two objects can increase gradually.
But the answer to this question is not the end. Many scientists think that the universe is flat on the flat field. In view of this, they represent the cosmic alignment of the anisotropic spectrum. Which seems to be a little bit, the universe is probably flat.
Another question still remains, where is the end of the universe?
Scientists have not given any answer to this question even today. However, scientists from Rayman's geometry have come to the conclusion that if the universe is more than three, then its exact shape can not be determined by the imagination of three dimensions. For example, an ants running on a two-dimensional paper surface can understand the beginning and end of the floor. But if the paper is made of three-dimensional cylinders, the ants can not find any precursors of the cylinder. Japan's Mitcho Kaku, one of the world's most advanced scientists of 'String Theory', has mathematically shown that the universe has ten dimensions. Apart from the three dimensions of our visible dimensions, we can not understand them. For example, if the three-dimensional piece of iron is made to make it smooth, then it seems to be two-dimensional to us. However, scientists of string theory believe that if these ten levels can be brought under the mathematical equation, then the final shape of the universe's shape and its limitations can be concluded.
As the knowledge of the mass is expanding, the universe is becoming more mysterious!