In ancient times, there was a saying that eternity. That is, the formation of heaven and earth is an unimaginably old topic, but how did heaven and earth come to be? Almost all countries in the world have creation myths. Modern science has also determined that the universe is about 13.8 billion years old.
However, a new question arises: Since the universe was created 13.8 billion years ago, what was the universe like before that? This question has also made countless astronomers feel speechless, because on the one hand, this question is difficult to explain, and on the other hand, it also lacks too practical evidence, after all, the solar system inhabited by human beings belongs to the remote area of the Milky Way, and human exploration of the solar system is still very primitive, so in this context, some of mankind's assertions about the universe are undoubtedly very naïve and cannot withstand scrutiny. Therefore, many scientists sometimes have to wonder: perhaps, it is very easy and cost-effective to use religion to interpret the gaps in science.
In fact, at present, there are about four theories about what the universe was like before the birth of the universe.
1. Circular Universe
According to current cosmological theory, the universe was created by the explosion of the singularity. In the process of the evolution of the universe, many stars will die and black holes will be formed. As black holes continue to proliferate, black holes will continue to involute and merge with each other, so that super huge black holes will continue to be born, and super black holes will swallow up a large number of other celestial bodies. And as the black holes merge, they eventually form an origin. Then, after the origin explodes, a new universe is formed, and so on.
In fact, the theory of cosmic cycle is currently considered to be the mainstream theory of cosmology, and many scholars believe that this theory may indeed be the truth of the universe.
In fact, the solar system is also in a cyclical state: the solar system was formed before the destruction of the previous generation of stars and the entire galaxy, and the nebula gave birth to the solar system and the major celestial bodies of the solar system. Therefore, the recipients of the circular universe, based on the past and present lives of the solar system, also feel that the circular universe is very reasonable.
Therefore, from the perspective of the circular universe, the universe will inevitably have a day of destruction, so the problem that human beings need to face is not only how to escape from the solar system and the galaxy, but also how to escape from the universe we are in.
Therefore, according to the theory of circular universe, the universe 13.9 billion years ago should still be the universe, but it is the universe of the previous generation.
2. Chaos
In addition, some scholars believe that the universe before the Big Bang was nothing, or chaotic, and that the current pattern of the universe was formed after the Big Bang. However, this doctrine does not explain how the chaotic state is formed, in other words, what factors are the formation of the chaotic world. Of course, those who accept this theory believe that the chaotic world may have been formed naturally, but it was only driven by chance that the theory of the Big Bang came into being.
3. Multiverse theory
The multiverse theory holds that there are different universes outside of the universe and that the creation of the universe is based on a strong energy field. This mysterious energy field will cause many universes to collapse while creating countless universes. So we have to believe that at this moment, many new universes are being created, but there are also many universes that are being destroyed. Therefore, we do not need to think about what the universe we are in was like before the birth of the universe. Because birth and disillusionment are both effects of energy fields. Therefore, according to this theory, before the formation of our universe, it was nothing, and our universe will still be destroyed. The difference is that it is impossible to regenerate - there is no inheritance between the new universe and ours.
4. Yongheng Universe
This doctrine holds that the universe has existed since eternity and will always exist. The so-called Big Bang is a false theory. So the theory is that it doesn't matter what our universe was like before it was born. But the problem is that there is no explanation for where the universe came from.