Voyage of the Stars

Of course, this is just one hypothesis.

After humans began to use physics to explain the end of the universe, various hypotheses have emerged, and the Big Crunch is another one.

The Big Crunch hypothesis is exactly the opposite of the Big Freeze Heat Death hypothesis. It believes that the universe will eventually stop expanding and return to the beginning of the Big Bang, that is, the singularity, in the Big Crunch.

Based on observational calculations, the Big Crunch hypothesis believes that the expansion of the universe will eventually stop, and the distance between galaxies will be more than twice as far as the Starry Age. Gravity will eventually overcome the original repulsion of the universe and pull all galaxies and even the expanding universe back in time.

At that time, the next stage of the third stage of the Starry Age will not be a degeneration period, but a contraction period. During that period, the space observed by all civilizations in the universe will no longer be a redshift phenomenon, but will instead become a blueshift because galaxies compete to gather and approach.

According to this theory, about 50 billion years after the current Starry Age, a natural disaster will occur in the universe, and all civilizations will struggle to death because of the natural disaster.

So what is the natural disaster?

The Big Collapse hypothesis holds that 50 billion years from now, the universe will begin to collapse, and then in the final 100 million years before the Big Collapse is complete, the galaxies in the universe will begin to collide with each other and eventually merge together.

In this process, the radiation in the cosmic environment will increase in energy as the universe contracts, so that the stars at that time will be immersed in the hot blue-shifted light of other stars. At the same time, the temperature drop of the cosmic microwave background radiation will be greatly enhanced as the temperature of the universe rises sharply.

This process is like the opposite stage of the rapid cooling stage brought about by the explosion after the Big Bang, and it is a rapid heating process brought about by the explosion.

Because of these two reasons, the stars will disintegrate before the galaxies collide.

The temperature generated by the simultaneous action of these two reasons will make the cosmic background temperature exceed the temperature of any star, so that it absorbs heat much faster than it releases heat. At that time, all stars will disintegrate and become ultra-high temperature gas clouds.

In such an environment, intelligent life will be like being placed in a steamer or microwave oven, being roasted by the high temperature of the cosmic environment, and there is no escape. Later, the overall environment of the universe will soon return to the chaotic stage of the thick soup at the beginning of the Big Bang. The four fundamental forces will be crushed into the original force one by one, and then all the proud civilizations will become part of the quark thick soup universe environment, indistinguishable from each other.

Scientists who insist on this hypothesis believe that the purpose of the great voyage of civilization is to escape the end of the great collapse of the universe. Go on a great voyage, pursue the first light in the universe, surpass that light, explore the mysteries of the edge of the universe, and find a way for civilization to avoid the great collapse.

However, opponents of this statement pointed out the loophole, saying that the diamond crystal representing the pioneers said that the great voyage of the pioneers was not a romantic pursuit of the first beam of light in the universe, but only for a glimmer of hope in despair, to find a glimmer of hope to be promoted to a cosmic civilization.

Scientists who insist on the big collapse hypothesis sneered at such rebuttals. They patched their own statements, saying that the great voyage of the sixth-level civilization may be the pursuit of the hope of being promoted to a cosmic civilization, and after becoming a cosmic civilization, it is to find a way to avoid natural disasters caused by the great collapse of the universe.

Both have their own opinions.

On the basis of the big collapse hypothesis, two more endings are derived, one is the big rebound, and the other is the cosmic cycle hypothesis, which is the oscillating universe theory.

The so-called big rebound means that due to the huge energy of the contraction process, it is likely to cause a second big bang, thus giving birth to a new universe. In the new universe, the rules of the universe may be very different from those of the previous generation of the universe.

As for the cosmic cycle hypothesis, based on the big rebound, the universe will explode and expand again, and then experience a big collapse again like the previous generation of the universe, and so on.

Scientists holding two views believe that in our universe, there may be civilizations that have escaped the big collapse of the universe, that is, the god-level civilization they imagine, which is the surviving civilization of the previous generation of the universe. They think that perhaps the existence that made the long-distance communication based on quantum entanglement invalid by changing the laws of physics is such a god-level civilization.

As for the big rip hypothesis, it is another direction of the heat death hypothesis of the universe. The hypothesis believes that the universe will eventually tend to thermal equilibrium in infinite expansion, and then continue to expand infinitely under the characteristic trend of infinite average dark energy, and finally tear the space-time of the entire universe apart.

According to calculations, the Big Rip will occur 90 billion years after the Star Age. At that time, all matter will be torn apart by space-time itself, including the universe itself.

The ending is self-evident, and all life will perish.

However, there are also scientists who study superstrings and dimensions who believe that the Big Rip may not be the end of the universe. The Big Rip may release all the dimensions that were originally curled up in the microcosm in the universe, thus forming a number of sub-universes with different rules.

The relevant scientific team holding this view even used superstring theory to build a universe model based on extra dimensions, which they called the membrane universe. In the membrane universe theory, scientists regard the universe in which humans live today as a universe located between high-dimensional membranes.

Based on this theory, they think that the ultimate goal of the Great Voyage may be to find the truth of the universe, and then transcend the membrane, so that civilization can be upgraded to a higher-dimensional universe.

In short, every cosmological model provides an explanation for the destination of the Great Voyage that is currently known to humans. As for whether it is correct or not, there is no way to know. Anyway, humans cannot verify it now.

Of course, the emergence of every universe model undoubtedly provides mankind with an idea for the advancement of civilization.

Compared with the previous cosmological model hypotheses, the discussion of the brane universe is suspected of being a nesting doll, and relatively few scientists accept it. But compared to the parallel universe theory, it is much better.

The reason is the experience of human beings themselves. Scientists who refute the parallel universe theory believe that if there is a parallel universe, then a human civilization that has developed to an extremely advanced level on another timeline cannot watch the original Taixiao Yangxi being destroyed.

Infinite parallel universes, infinite possibilities, naturally there is a possibility for human beings to develop to the point where they can travel through parallel universes.

Based on this, the parallel universe theory has the least market among humans.

Among these various theories, there is one theory that is quite inconspicuous, and that is the vacuum decay hypothesis. Originally, this hypothesis was sealed in history by mankind, but thanks to the rhombus crystal that represents the pioneer, it has been overturned. out.

At that time, Rhomboid Crystal said that mastering vacuum zero-point energy is the basis for infinite energy. It was this sentence that inspired human scientists to believe that the universe would usher in the vacuum decay of the universe because advanced civilizations borrowed vacuum zero-point energy without repaying it. .

The deep-seated reason for the despair and the only hope mentioned by the rhombus crystal may be the vacuum decay disaster of the large universe. Some scientists even believe that vacuum decay has actually already occurred. Now it has appeared somewhere or many places in the universe, and is spreading in all directions at the speed of light, destroying the universe.