IC1101 is the largest galaxy in the observable universe, with a diameter of nearly six million light-years. In an observable universe where the diameter of a river system is usually measured in 10,000 light-years, a river system with such a large diameter is somewhat unusual.

In fact, this river system is indeed unusual. Xiao Yu found it difficult to explain why such a large river system was formed in his current theories of river evolution.

Of course, it is unknown if there is a larger river system than IC1101 in the unobservable universe, but one thing is certain, this is a big one, and an unusually large one.

Here, one point needs to be explained, we usually think that the radius of the universe is 13.7 billion light years, and the "universe" referred to here is only the scope of the observable universe, because the universe has only been 13.7 billion years since its birth, and if we calculate our visible range at the speed of light, our observable universe radius is also 13.7 billion light years. It's not that there is nothing beyond this 13.7 billion light-year distance, there may also 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 reached Xiao Yu. There, it belongs to the unobservable universe. The observable universe and the unobservable universe add up to our vast three-dimensional universe.

This leads to another contradiction - the speed of light is the upper limit of the speed of the universe, and it stands to reason that the expansion of the universe will not be greater than the speed of light. How did they manage to spread out more than 13.7 billion light-years in the space of 13.7 billion years?

The answer is simple. The expansion of the universe is not an ordinary movement, they are the expansion of space. The expansion of space is not limited by the speed of light.

IC1101 is the king of all river systems within this 13.7 billion light-year radius. It's a bit unusually large, which can be seen in a simple comparison of the numbers.

The distance between the Milky Way and the Andromeda Galaxy is two 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. In the past, the Milky Way was already the vast universe in Xiao Yu's eyes, and the distance between the Milky Way and the Andromeda Galaxy was even more immense. If it weren't for the stargate left by the civilization in that travel direction. It will take a lot of trouble for Xiao Yu to cross this distance.

However, the diameter of the IC1101 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 Greater Magellanic Galaxy, the Triangulum Galaxy, and so on are all included.

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

The IC1101 presented to Xiao Yu is not too bright - of course. This "not very bright" is in contrast to its sheer size and many stars. In other words. With so many stars and a huge volume, IC1101 should be much brighter than it is now. But it didn't. So this means that most of the member stars of IC1101 in the river system are red giants or red dwarfs with faint luminosity.

Further observations confirmed Xiao Yu's conjecture. Xiao Yu saw that a large number of elderly red giants with huge size, but extremely low density and extremely low luminosity were flooded in this river system. At the same time, the mass of these red giants is generally not large. Stars twenty times more massive than the Sun are extremely rare.

This means another thing, which is in the river system IC1101. The content of star dust is very small. With less star dust, new stars will form more slowly. It is precisely because there is no new star replenishment that this situation of old stars will appear in the river system IC1101.

It's a very decaying, very decadent situation. It's different from the vibrancy of the Milky Way. The predominance of red giants means that life is very difficult to exist here. Because there is no doubt that the area around the red giant is not suitable for life, and even if life evolves around a star, it is difficult for it to safely survive the initial period of life. Because of the large number of red giants, it also means that extreme phenomena such as supernova explosions have increased, and the energy released by high-frequency supernova explosions is enough to destroy any initial life, even the second-level peak civilization. All three levels of civilization have to suffer heavy losses under such circumstances.

However, this does not mean that there is no life in IC1101. Because things always happen by chance, and thanks to the huge number and volume of stars in the river system IC1101, thanks to this huge cardinality, there is a high chance of accidental existence.

Xiao Yu's huge fleet has entered the river system IC1101, and is advancing at high speed here. For this river system, Xiao Yu has a strong interest. Xiao Yu tried to further probe the river system IC1101 to solve several doubts in his mind. In Xiao Yu's eyes, the river system IC1101 is a very qualified, excellent and rare experimental subject.

"I wonder if there is a high-level civilization in this river system? Like a seventh-level civilization, an eighth-level civilization, and so on. Xiao Yu thought silently, "It will take a long time for advanced civilizations like level seven and level eight to appear. According to the situation of the river system IC1101 at the moment, it can be known that in the distant past, the river system IC1101 also had a period of young glory. At that stage, the river system is full of stars of modest size, and around these stars, there is a good chance that life will be born. At that time, the river system IC1101 was still very calm, and the environment was very suitable for the development of life. It is quite possible that those beings evolved intelligence and then began to explore the universe. ”

"Well, if they existed, they would be very powerful. Because they have been through hundreds of millions of years, if not billions of years, even if a pig survives for so long, it is enough to build a spaceship by itself. It is likely that they have entered the category of eighth-level civilization. Underneath them, with the rapid aging of stars and the absence of new stars for a long time, it is highly likely that there will be a fault in the process of life birth in the river system IC1101. The number of medium civilizations at level 5 or 6 may be even rarer than the number of advanced civilizations, and instead there will be a large number of low-level civilizations. These low-level civilizations are constantly being born and being destroyed - the IC1101 of the river system at this moment is really not a good place for the development of life. ”

In the midst of the stars in the sky, Xiao Yu is constantly advancing. In front of Xiao Yu, there was a slightly dark red canopy. This is due to the large amount of red red giant light rays. These red stars are hidden in the dark red canopy, and 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 bit of an unusual and strange atmosphere hidden in the magnificence. The environment here is reminiscent of a hell filled with dark red lava. These oppressions are not only manifested in the constant supernova explosions - Xiao Yu once observed the appearance of three supernovae in the space of an hour. The appearance of each supernova means that there is a huge energy that sweeps across the universe within a range of thousands of light-years, killing any weak existence within a range of thousands of light-years. That's not the main thing, though. With Xiao Yu's level of technology at the moment, he can basically ignore the energy of the supernova explosion. The most important thing is the general atmosphere of the rundown.

It's like an old man in his last years, with destruction everywhere and the smell of death everywhere.

"If there were life here, would their civilization and culture also be affected by this atmosphere, and thus evolve into brutality and bloodthirstiness?" Xiao Yu thought silently.

This is a very likely scenario. Imagine if the sun in the age of the earth was not a stable state in Xiao Yu's memory, but helium flashes from time to time, and explosions from time to time - and it is impossible to say when a devastating explosion will come, in that case, human society must also become chaotic and bloodthirsty, because people do not know when their lives will be ended because of an accident.

Of course, this is just a little speculation on Xiao Yu's part. Xiao Yu was not worried about this. Xiao Yu's strong strength can make Xiao Yu indifferent to any situation.

Xiao Yu is heading towards the core of the river system IC1101. It is the only area of the river system that has a large number of stars forming, and it is the only place where the aging river system is still alive.

At this moment, in a place that Xiao Yu didn't know, there were several rather secret existences communicating.

"The cosmic civilization was destroyed by Xiao Yu."

"We can't tolerate Xiao Yu continuing to exist. He will surely become stronger and stronger, and eventually pose a deadly threat to our camp. Spokespeople suppress dissent in the camp because of their ridiculous personal feelings, but we cannot sit idly by. He must be destroyed while he is still weak. ”

"Yes. The lion fights the rabbit with all his strength, and we cannot make the mistake of cosmic civilization again. Let's let a few civilizations join forces and crush Xiao Yu with the most powerful force. Whether the spokesperson wants to do these things, we have to do them. ”

"We need a reason. Otherwise, our actions could cause a split in the camp. It's not good for us ourselves. ”

"Why? …… We have it. Xiao Yu has arrived at our hometown river system at this moment, right there, set up a game for Xiao Yu, let him find a reasonable reason for us to attack him......" (to be continued......