Super Battleship Reborn

It is the largest galaxy in the observable universe, with a diameter of nearly six million light-years. ; In the observable universe where the diameter of a river system is usually measured in units of tens of thousands of light-years, a river system with such a huge diameter is somewhat unusual.

In fact, this river system is indeed unusual. Xiao Yu found that his current theory of river system evolution is difficult to explain why such a huge river system is formed.

Of course, it’s still unknown whether there are river systems larger than this in the unobservable universe, but one thing is certain, this is a big guy, and it’s an unusual big guy.

Here, one thing needs to be explained clearly. We usually think that the radius of the universe is 13.7 billion light-years. The universe referred to here is only the scope of the observable universe, because the universe has only 13.7 billion light years since its birth. In 1.7 billion years, if we calculate our visible range at the speed of light, the radius of our observable universe is 13.7 billion light years. It's not that there are no things beyond this 13.7 billion light-year distance, there may be stars and galaxies there, but Xiao Yu can't know the specific situation there, because the light carrying the information there has not yet Arrive at Xiao Yu. There, it belongs to the unobservable universe. The observable universe and the unobservable universe add up to form 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. It is reasonable to say that the expansion speed of the universe will not be greater than the speed of light. Then, how do they do it? In 13.7 billion years, Among them, the ones that spread out to a range greater than 13.7 billion light-years?

The answer is simple, the expansion of the universe is no 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 the river systems within this 13.7 billion light-year radius. Its size is somewhat extraordinary, which can be detected by a simple data comparison.

The distance between the Milky Way and the Andromeda Galaxy is 2 million light years, the diameter of the Milky Way is 100,000 light years, and the diameter of the Andromeda Galaxy is 200,000 light years. Before. The Milky Way is already the vast universe in Xiao Yu's eyes. The distance between the Milky Way and Andromeda is even greater. If it wasn't for the star gate left by the civilization in the direction of travel, it would have taken a lot of trouble for Xiao Yu to cross this distance.

But. The diameter of the river system has already reached the order of six million light-years. Put it in the place of the Milky Way, and it will put the Milky Way, the Andromeda Galaxy, the Large and Small Magellanic Clouds. The Triangulum galaxy and more are all included.

It's just that huge. At this moment, Xiao Yu is on the edge of this huge river system.

What appeared in front of Xiao Yu was not too bright—of course, this not too bright was compared with its huge size and numerous stars. in other words,

With so many stars and a huge volume, it is common sense that it should have a much higher brightness than it does now. But it doesn't. Then this means one thing, most of the member stars in the galaxy are dim red giants or red dwarfs.

Further observations proved Xiao Yu's conjecture. Xiao Yu saw it. A large number of old red giant stars with huge volume but extremely low density and extremely low luminosity are filled in this river system. At the same time, the mass of these red giants is generally not large. Stars with a mass greater than twenty times that of the Sun are extremely rare.

This means another thing, there is in the river system, the content of star dust is very small. With less star dust, the formation of new stars will be slow. It is precisely because there is no new star replenishment that this kind of situation dominated by old stars will appear in the river system.

This is a very decadent, very decadent situation. It is different from the vitality in the galaxy. The stellar structure dominated by red giants means that it is difficult for life to exist here. Because there is no doubt that the surroundings of red giant stars are not suitable for life, and even if life evolves around a certain star, it is difficult for it to survive the initial period of life safely. Because there are many red giant stars, it also means that extreme phenomena such as supernova explosions have increased. The energy released by high-frequency supernova explosions is enough to destroy any initial life—even including the second-level peak civilization. The third-level civilization will suffer heavy losses under such circumstances.

But that doesn't mean there's no life in the river system. Because things always happen by chance, and thanks to the huge number and volume of stars in the river system, thanks to this huge base number, the probability of chance existence is very high.

Xiao Yu's huge fleet has entered the river system and is advancing at high speed here. Xiao Yu has a strong interest in this river system. Xiao Yu tried to conduct further exploration of the river system to solve several doubts in his heart. In Xiao Yu's eyes, He System is a very qualified, excellent and rare experimental subject.

I don't know if there are advanced civilizations in this river system? Like seventh-level civilizations, eighth-level civilizations, etc. Xiao Yu thought silently, It takes a long time for advanced civilizations like seventh and eighth levels to appear. And according to the current situation of the river system, we can know that in the distant past, the river system also had a period of youth and glory. In that stage, the river system was full of moderately sized stars. Around the stars, life is very likely to be born. At that time, the river system was still very calm, and the environment was very suitable for the development of life. It is very likely that those life evolved wisdom, and then began to explore this universe.

Well, if they exist, they must be very powerful. Because they have experienced hundreds of millions of years, or even billions of years. Even if a pig lives for such a long time, it is enough to build a spaceship by itself. They are likely to have entered the category of eighth-level civilization. And below them, as the stars age rapidly and there is no new star for a long time, the birth process of life in the river system is very likely to be faulty. Five-level Or the number of medium civilizations at level 6 may be even rarer 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 destroyed-the river system at this moment is really not a Great place to grow your life.

Among the stars all over the sky, Xiao Yu is constantly moving forward. What appeared in front of Xiao Yu was a slightly dark red sky. This is due to the influence of a large number of red red giant stars. These red stars are embedded in the dark red sky and are very hidden. They only have a slightly brighter luminosity than the red background. With the naked eye, it would be difficult to distinguish these stars from the background color.

The scenery here has a strange and strange atmosphere hidden in its magnificence. The environment here is easily reminiscent of a hell filled with dark red magma. These oppressions are not only manifested in the constant supernova explosions—Xiao Yu once observed the appearance of three supernovae within an hour. The appearance of each supernova means that there is a huge wave of energy sweeping across the cosmic space within thousands of light-years, killing any weak existence within thousands of light-years. But this is not the most important. With Xiao Yu's current level of technology, he can basically ignore the energy of supernova explosions. Most important is the general atmosphere of run-down here.

It is like an old man who has entered his final years, destruction is everywhere, and the breath of death is everywhere.

If there are lives here, will their civilization and culture be affected by this atmosphere, and thus evolve into cruelty and bloodthirsty? Xiao Yu thought silently.

This is a very likely scenario. Imagine if the sun in the age of the earth was not the stable state in Xiao Yu's memory, but helium flashes appeared from time to time, and eruptions appeared from time to time-and it was hard to say when the devastating eruption would come. Under the circumstances, presumably human society will become chaotic and bloodthirsty, because people don't know when their lives will be terminated due to an accident.

Of course, this is just Xiao Yu's guess. Xiao Yu was not worried about this. Xiao Yu's powerful strength can make Xiao Yu calmly face any situation.

Xiao Yu is setting off towards the core of the river system. There, it is the only region in this river system that has a large amount of star formation, and there, it is the only place where this aging river system still maintains vitality.

At this moment, in places that Xiao Yu doesn't know, there are several rather secret existences communicating.

The civilization of the universe was destroyed by Xiao Yu.

We can't tolerate Xiao Yu's continued existence. He will become stronger and stronger, and eventually pose a fatal threat to our camp. The spokesperson suppresses different opinions in the camp because of his ridiculous personal feelings, but we You can't sit and wait like this. We must destroy him while he is still weak.

Yes. The lion fights the rabbit with all its strength. We can't make the mistake of the civilization of the universe again. Let us several civilizations unite and crush Xiao Yu with the most powerful force. Whether the spokesperson is willing or not, these things, We all have to do it.

We need a reason. Otherwise, our actions may divide the camp. It is also very bad for ourselves.

Is there a reason?... We have it. Xiao Yu has already arrived at our hometown, the River System, right there. Let him find a reasonable reason for us to attack him...