Vol 3 Chapter 987: Rational reason

It is the largest galaxy in the observable universe, with a diameter of nearly six million light years. In the observable universe, where river diameters are usually measured in 10,000 light-years, a river system of such a huge diameter seems a little unusual.
In fact, this river system is indeed unusual. Xiao Yu found that his current theory of river evolution is difficult to explain why such a large river system was formed.
Of course, it is not known whether there is a larger river system in the universe in the unobservable range, but one thing is certain, this is a big guy, and it is an unusual big guy.
Here, there is one point that needs to be explained clearly. We usually think that the radius of the universe is 13.7 billion light-years. The "cosmos" referred to here is just the range of observable universes, because the universe is only one hundred and thirty In 1.7 billion years, if we calculated our visible range at the speed of light, our observable universe radius would also be 13.7 billion light years. It's not that there is nothing beyond this distance of 13.7 billion light years. There may also be stars and galaxies there, but Xiao Yu cannot know the specific situation there because the light carrying the information there is not yet Arrived at Xiao Yu. There, it belongs to the unobservable universe. The observable universe and the unobservable universe together make up our huge three-dimensional universe.
This will lead to another contradiction-the speed of light is the upper limit of the speed of the universe. Theoretically speaking, the expansion speed of the universe will not be greater than the speed of light. So how did they do it in 13.7 billion years? Among them, a range of more than 13.7 billion light years has spread?
The answer is simple. The expansion of the universe is not ordinary motion. They are expansions of space. The expansion of space is not limited by the speed of light.
It is the king of all river systems in this 13.7 billion light-year radius. Its size is a bit unusual, which can be detected by a simple comparison of data.
The distance between the Milky Way galaxy and the Andromeda galaxy is 2 million light-years, the diameter of the Milky Way galaxy is 100,000 light-years, and the Andromeda galaxy is 200,000 light-years in diameter. Before. The Milky Way is already a vast universe in Xiao Yu's eyes. The distance between the Milky Way and the Andromeda Galaxy is even more natural. If there wasn't the star gate left by civilization in the direction of travel, Xiao Yu would have to go through this distance.
but. The diameter of the river system has reached the order of six million light years. Put it in the position of the Milky Way, and it will put the Milky Way, the Andromeda Galaxy, the Large Magellanic Cloud. Triangle galaxies and so on are all included.
It's just that huge. At the moment, Xiao Yu is on the edge of this huge river system.
The one presented to Xiao Yu is not too bright-of course, this "not bright" is compared with its huge volume and numerous stars. In other words, those who have so many stars and huge volume should have much higher brightness in common sense than now. But it didn't. Then this means one thing. Most of the member stars of the river system are dim red giants or red dwarfs.
Further observations confirmed Xiao Yu's conjecture. Xiao Yu saw it. A large number of old red giants with huge volume, but extremely low density and low luminosity are flooding this river system. At the same time, the mass of these red giants is generally not great. Stars that are twenty times more massive than the sun are extremely rare.
This means another thing. There is little star dust in the river system. With less star dust, the formation of new stars will be slow. It is precisely because there are no new stars to supplement that the old star-like situation will appear in the river system.
This is a very decadent and decadent situation. It's not as vibrant as the Milky Way. The stellar structure dominated by red giant stars means that life is difficult to exist here. Because there is no doubt that red giant stars are not suitable for life, and even if life evolved around a certain star, it is difficult to survive the initial period of life safely. Because of the large number of red giants, it also means that extreme phenomena such as supernova explosions have increased. The energy emitted by high-frequency supernova explosions is enough to destroy any initial life-even the second peak civilization. The tertiary civilization will suffer heavy losses under these circumstances.
But this does not mean that no life exists in the river system. Because things always happen by chance, and because of the huge number and volume of stars in the river system, and because of this huge base, chances of existence are very high.
Xiao Yu's huge fleet has entered the river system, moving at high speed here. Xiao Yu has a keen interest in this river system. Xiao Yu tried to further explore the river system to resolve several doubts in his mind. In the eyes of Xiao Yu, the river system is a very qualified, excellent and rare experiment.
"I don't know if there is a high-level civilization in this river system? Such as the seventh-level civilization, the eight-level civilization, and so on." Xiao Yu thought silently. According to the reverse of the current situation of the river system, we can know that in the distant past, the river system also had a young and glorious stage. During that stage, the river system was full of stars of moderate size. Life is likely to be born around the stars. At that time, the river system was still calm, and the environment was very suitable for life. Those lives may have evolved wisdom, and then began to explore the universe. "
"Well, if they exist, they must be very powerful. Because they have gone through hundreds of millions of years, and even billions of years, even if a pig has lived this long, it is enough to build a spaceship by itself. They are likely to have entered the category of eighth-level civilization. Below them, with the rapid aging of stars and the absence of new stars for a long time, the birth process of life in the river system is likely to have a fault. Level five Or the number of medium-level civilizations at level six may be even less than the number of high-level civilizations, replaced by a large number of low-level civilizations. These low-level civilizations are constantly being born and being destroyed-the river system at this moment is not really Great place to grow your life. "
In this sky full of stars, Xiao Yu is constantly advancing. Presenting in front of Xiao Yu is a slightly dark red sky. This is caused by a large amount of red red giant light. These red stars are hidden in the dark red sky, and they only have a slightly brighter light than the red background. If you look at it with the naked eye, it will be very difficult to distinguish these stars from the background color.
The scenery here has a little strange and strange atmosphere hidden in the magnificence. The environment here is easily reminiscent of filled with dark red magma. These oppressions are not only manifested in the constant supernova explosions—Xiao Yu once observed the appearance of three supernovas in an hour. The appearance of each supernova means that a huge amount of energy swept through thousands of light-years of cosmic space, killing any weak existence within thousands of light-years. But this is not the main thing. With Xiao Yu's level of science and technology at this moment, the energy of the supernova explosion can basically be ignored. The most important thing is the dilapidated general atmosphere here.
It's like an old man stepping into the last year, with destruction everywhere, and the breath of death everywhere.
"If life exists here, will their civilization and culture also be affected by this atmosphere, and thus become cruel and bloodthirsty?" Xiao Yu thought silently.
This is very likely. Imagine if the sun in the Earth's era was not a stable state in Xiao Yu's memory, but a helium flash from time to time, and bursts from time to time-and it ’s hard to say when a devastating burst will come, in that kind of Under the circumstances, human society may also become chaotic and bloodthirsty, because people do not know when their lives will be terminated by an accident.
Of course, this is just a little guess from Xiao Yu. Xiao Yu was not worried about it. Xiao Yu's powerful strength allows Xiao Yu to be indifferent to any situation.
Xiao Yu is heading towards the core of the river system. There, it is the only area in the river system with a lot of star formation ~ EbookFREE.me ~ There, it is the only place where this aging river system still maintains vitality.
At the moment, where Xiao Yu didn't know, there were several rather secretive beings communicating.
"Cosmic civilization was destroyed by Xiao Yu."
"We cannot tolerate Xiao Yu's continued existence. He will surely become stronger and stronger and eventually pose a fatal threat to our camp. The spokesperson suppresses the different opinions in the camp because of that ridiculous personal feeling. You can't just sit there and wait. He must be destroyed while he is still weak. "
"Yes. Lions and rabbits also use their full strength, we can no longer make the mistakes of cosmic civilization. Let us several civilizations join forces and crush Xiao Yu with the most powerful force. Regardless of the spokesperson's willingness, these things, We all have to do it. "
"We need a reason. Otherwise, our actions could cause divisions in the camp. This is also very bad for us."
"What's the reason? ... We have it. Xiao Yu has reached our hometown river system at this moment, right there, and set up a game for Xiao Yu, let him find the reasonable reason for us to shoot him ..."