Review
There are many theoretical models of the origin of the universe, but the most recognized by mainstream academics is the theory of the Big Bang, according to its explanation, the birth of the universe began with an explosion 13.82 billion years ago, and everything we see now diverges from there, and that initial origin is also called the singularity.
But logic would force us to ask the question, since the Big Bang brought about all that exists, where did the raw materials for it explode come from?
The Big Bang
First, to review the Big Bang theory, according to the birth process of the universe explained by this model, when the universe did not exist more than ten billion years ago, the only existence was a dense origin of high temperature and pressure, which is also called a singularity.
Its explosion is inevitable in a sense, because its volume can not continue to carry such a high temperature and pressure of the contents, so at one moment, it exploded.
This is not an ordinary explosion as we understand it, and it should be said that to this day, this explosion is still not over.
The explosion of the singularity is actually divided into several different stages, the first stage is the most critical, but also the shortest duration, the entire dense structure in a very short time interval completed the dissolution, and then entered the second stage.
At this time, the entire explosion brought about the rapid expansion of dense material, and in the entire structure, it was the rapid expansion of the space-time of the universe, just like a sponge that was originally pressed was now released again, and began to absorb water and expand.
After this phase lasted for some time, the rate of expansion began to slow down at a certain node, but the expansion itself continued, and the various celestial bodies, stars, and interstellar matter we see today are the result of this expansion.
Of course, if the cosmic space-time is regarded as a complete existence, then these huge celestial bodies are actually like a particle of an object, with almost no other difference except the difference in size.
In addition to these material beings that we humans can recognize, it is very likely that there are things outside our cognition in the space that is regarded as empty, such as the so-called dark matter.
That is to say, the entire universe of space-time is not pulled together by gravity by many scattered celestial bodies and interstellar matter as we think, but it is in a very complete state itself, and the void we think of as an important part of it.
Of course, astronomical research also shows that the expansion rate of the entire universe seems to be accelerating, and according to the Big Bang model, this sudden slow to fast is likely to be a precursor to the beginning of the contraction of the entire universe, that is, the universe can expand from the singularity to the way it is today, and it can also shrink back from this state to its original state until the next explosion occurs again.
From this point of view, we can also understand the so-called reincarnation world, perhaps after the next Big Bang, the entire history of the earth and humanity will repeat itself, or not appear at all.
The source of the raw material
If we trace the origin of the universe back to the moment of the Big Bang, then we are only explaining the process of the formation of space-time in the universe today, without fundamentally answering the question of origin. We are not so much asking about the origin of the universe as we are about the origin of existence.
The singularity seems to have an infinite amount of matter to expand into such an endless universe, so where does the matter in the singularity come from?
Current scientific research has not yet been able to give a convincing explanation for this problem, and this kind of problem involving the ultimate problem is really out of reach for science that pays attention to the spirit of positivism.
Of course, neither astronomers, physicists nor science fiction writers have given up trying to solve this problem, for example, in the famous three-body, the writer Liu Cixin once proposed an explanation for a high-dimensional universe, borrowing such an inference to put the existence we humans understand into some existence that humans cannot understand.
In terms of the needs of thinking, he successfully placed some uneasiness and nihilism, but from a scientific point of view, this is just a cliché, and how the so-called high-dimensional universe is known is what we need to explore.
In addition, scientists have also tried to give their own ideas about the source of matter in the singularity, such as some ideas that there may be no origin of existence at all, and the reason why humans ask questions in this way is entirely a trap created by logic.
The matter in the universe may itself be in an eternal cycle, and the raw material for the explosion of the singularity is likely to be the result of the demise of another universe, but this demise does not refer to the reduction in the quantity of matter, but to the change in form. On the scale of time, the universe does not go from birth to death, but from birth to death and from extinction to birth, and so on, and so on, and the sum of all matter always remains unchanged.
There is also a theory that the answer may be found in black holes, and that this structure that can even absorb light may have unknown properties, such as at a certain moment, it will show completely different properties, no longer like a whirlpool to sweep away the surrounding matter, but like a fountain to continuously transport matter outwards, the former represents the demise of this universe, the latter represents the birth of that universe.
epilogue
Therefore, before asking the source of the raw materials of the Big Bang, we must first reflect on the problem itself, and follow the linear logic to ask whether the ultimate way of thinking is correct, if the formation and change of the universe does not apply this logic, then we continue to move forward along this road, can only be the opposite.