How big is the universe? From its birth to now, it has been expanding beyond our imagination

The earth is the home where human beings have lived for millions of years. Since the day when human beings were born, we have wanted to understand how big the world is and what the shape of the world is. But after millions of years of exploration, our ancestors did not understand.

Until mankind entered the era of scientific and Technological Development hundreds of years ago, with the continuous updating of transportation, people’s vision has been broadened, and they have a preliminary understanding of the world. At that time, we knew that our world is a planet, and beyond the planet is the solar system. But we didn’t know the shape of the earth until the first man-made satellite.

When humans walk out of the earth and stand in space, we can clearly see that the earth is a sphere, and the diameter and volume of the earth can be easily measured from space, which is the power of science and technology. When human beings walk out of the earth, they have an accurate understanding of the size of the earth, but at the same time they have realized the vastness of the universe. At this time, people think of another question: how big is the universe?

As for the origin of our universe, the view of modern science is that it originated from the big bang of singularity 13.8 billion years ago. This singularity is an infinitely small thing with infinitely large mass. Scientists do not know what it is. Singularity seems to be a particle with extraordinary energy. When this particle explodes, it generates unimaginable energy, and these energies produce various kinds of cosmic dust and basic substances. Substances form celestial bodies with different masses through the action of gravity.

After the big bang, the universe has been expanding all the time, and its expansion continues to this day. If you want to know how big the real universe is, you need to know the expansion speed of the universe, and then multiply it by the age of the universe to calculate the current diameter range of the universe. But how fast is the universe expanding?

If we calculate the expansion speed of the universe as the speed of light and multiply the speed of light by the age of the universe, the diameter will be 27.6 billion light years. Is this the diameter range of the universe? In fact, it’s not at all. The observable universe is far larger than that. Through research and exploration, scientists found that the expansion speed of the universe is faster than the speed of light, and this expansion speed does not seem to be a constant value.

In the early days after the big bang, the expansion speed of the universe far exceeded the speed of light. Later, the speed continued to decrease, but it still exceeded the speed of light. Now, scientists believe that the expansion speed of the universe also exceeded the speed of light. The uncertain expansion speed of the universe makes it impossible for us to really calculate the diameter of the universe, but we know that the real size of the universe is beyond our imagination.

So what’s the shape of the universe? The energy generated immediately after the singularity explosion must be diffused around, and the expansion of the universe is also diffused around. Therefore, the shape of the universe may be similar to that of a sphere. In fact, it can be seen from the fact that most of the celestial bodies in the universe are spheres. The universe contains innumerable celestial bodies. The general shape of celestial bodies can also reflect the general shape of the universe.

If at the time of the big bang, someone stood 13.8 billion light-years away and shot a bullet at the speed of light at you, today, although the bullet is still moving towards you at the speed of light, it can never get close to you, instead, it is farther and farther away from you. As for the size of the universe, the scientific community has no answer. At present, the answer given by the scientific community is that the observable universe is about 92 billion light-years.

Remember, 92 billion light-years is just the universe that human science and technology can observe, it is not the real universe. With the continuous development of human science and technology, the scope of the observable universe will continue to expand in the future. Whether we can observe the edge of the universe one day is still unknown. If the universe continues to expand faster than the speed of light, human beings may never reach the edge of the universe.

Human beings recognize the size of the earth with the help of science and technology, breaking through the speed, constantly breaking through the speed, and finally let us get out of the earth and see the real earth. So the key factor for us to understand the size of the universe is speed. Of course, if there are more advanced telescopes that can see things beyond the universe, it seems that they can also preliminarily infer the size of the universe.

For example, after mankind entered the road of scientific and technological development, the first thing that appeared was the astronomical telescope, which let us see the space outside the earth, and people naturally realized that the earth has a size, but we can’t know exactly what the earth really looks like. If we have an astronomical telescope that can observe the scenery outside the universe, we can also determine the size of the universe. To really understand the size of the universe, we still need to be able to go out of the universe and stand outside the universe to observe and measure.

Some people may say that the universe is the only one, and there can be no space outside the universe. In fact, this kind of cognition is incorrect. Do you want to know that there was space before the birth of the universe? If not, where is the singularity? And the singularity Big Bang Universe was born, the universe can continue to expand outward at the speed of super light. If there is no space outside the universe, how can the universe expand outward? This is similar to blowing balloons. Balloons can expand continuously, depending on the fact that there is enough space outside the balloon to allow it to expand. Otherwise, if you put it in a fixed size box, can you blow balloons continuously? It’s obviously impossible.

However, if we want to go to the edge of the universe or even out of the universe, the speed of a spaceship is beyond our imagination. In the current scientific system of human beings, according to Einstein’s theory of relativity, the speed of an object can only be infinitely close to the speed of light. If the speed of an object can’t even reach the speed of light, how can we explore the universe? Even if the speed of the spacecraft reaches the speed of light, the scope of the universe we can explore is very limited, limited to the galaxies near the solar system.

Only by flying faster than light can we travel all over the Milky way and even explore extragalactic galaxies. But superluminal speed is only a general concept. Both 10 times and 100 times light speed belong to the superluminal speed range, but the difference is huge. At present, the observable range of the universe is 93 billion light-years. If we want to reach the edge of this range, we may need to reach at least ten thousand times the speed of light. Can we really achieve such a speed?

But even if we achieve the speed of light 10000 times, 100 million times, can we reach the edge of the universe or even go out of the universe? It may still be an unknown number. It can be seen that if we want to really go to the edge of the universe and get out of the universe, we still need a way of shuttling beyond the speed mode, such as the wormhole theory put forward by scientists.

Wormhole is a gate connecting different space positions in the universe. Through it, we can quickly shuttle between two galaxies. For example, two galaxies separated by millions of light years can be reached in a very short time through wormhole. This time may only be a few hours. This speed mode is completely beyond our understanding of speed, not the speed of light or superluminal speed .

It can be seen that if human beings want to really explore the size of the universe, they can still rely on this wormhole theory. If it can be realized in the future, human civilization will become the advanced civilization of the universe at one stroke. We also have the hope to explore the ultimate mystery of the universe. As long as human beings continue to develop science and technology, and continue to create miracles with the power of science and technology, we will be able to uncover it one day Open all the mysteries of the universe, explore the size of the universe.

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