This happened during the Earth Age.

At that time, a neutrino telescope observed a neutrino burst from an elderly star.

After the birth of a star, it will have a different outcome depending on the mass. A medium-to-small star like the Sun expands into a red giant in the last years, increasing in size exceedingly, and then the outer shell is blown away and the interior is squeezed to form a compact star called a white dwarf.

White dwarfs are so dense that a white dwarf the size of the Earth can have a mass equivalent to that of the Sun.

One cubic centimeter of white dwarf material has a mass of up to a ton or more.

Larger stars will have an extremely violent explosion at the end of their lives, blowing up a huge part of their mass. The inner core leaves behind a star that is denser than a white dwarf, named a neutron star.

One cubic centimeter of neutron star material can weigh up to one billion tons.

This explosion of massive stars dying in the last years is called a supernova explosion. Because it's so bright, the amount of energy released is so great – the Milky Way is made up of about 200 billion stars, and when a supernova explodes, it emits almost as much light as the other 200 billion stars combined.

In the last years of a star, when a supernova explosion is about to occur, there is usually a violent neutrino explosion event inside. Neutrinos can be a harbinger of supernova explosions.

At the beginning, there was an event on the earth because of the observation of neutrino explosions in advance, and the target star exploded soon after knowing that the target star would explode a supernova, so the world's telescopes urgently moved to point to it, and completely observed the process from the beginning to the end of the explosion, and obtained countless valuable information.

Chen Yue wanted to replicate this story at this moment.

The opportunity to observe a supernova explosion in its entirety is rare.

But after a detailed analysis of this impact event, Chen Yue found that the energy level of this neutrino seems to be ridiculously high.

This is higher than the energy level of neutrinos released when a supernova explodes. Even the energy level of binary neutron star merger is not comparable.

"What's going on?"

Chen Yue was very puzzled: "Could it be that there is an astronomical event in the universe that is more violent than the collision of neutron stars?" ”

Chen Yue couldn't figure it out even if he wanted to break his head.

But he can only put this matter aside for the time being. After all, there are many unsolved mysteries in the universe, and when technology develops in the future, you can figure them out naturally, and there is no need to dwell on them now.

But soon after, the Deep-Sea 2 neutrino telescope detected neutrino collisions of similar energy levels.

The joint observation data of the two neutrino telescopes can allow Chen Yue to locate the location of the neutrino source. He did the math.

When he saw the result, Chen Yue was stunned.

Wang Liangsan.

Data analysis shows that the source that released this extremely high-level neutrino is located near a star named "Wang Liangsan", which is very close to it.

Chen Yue knew that Wang Liangsan was a star slightly larger than the sun, and the distance between him and the sun was about 20 light-years.

It is also an ordinary star. Such an ordinary star...... How is it possible to release neutrinos of such high energy levels?

It doesn't make sense.

Chen Yue manipulated his optical telescope and aimed it in the direction of Wang Liangsan.

In the past, Chen Yue hadn't paid much attention to it. It's just too ordinary to be observable.

But at this moment, Chen Yue unexpectedly found that its brightness was about 3% higher than the previous brightness recorded.

Chen Yue was even more strange.

This star is relatively stable, how can it suddenly increase in brightness? Could it be that it was hit like the sun?

But no matter how violent the impact is, it will not be able to excite neutrinos of such an energy level.

Chen Yue thought about it and continued to pay attention to this star.

In the following period, Chen Yue discovered more anomalies about the star.

Next to this star, there is an extremely small, but extremely bright light source, so high that it can be detected by Chen Yue's telescope even 20 light-years apart, and it only lasts for two seconds before disappearing.

At about the same time as the appearance of this light source, two neutrino telescopes again observed high-energy neutrino impacts.

Chen Yue suspected that the light source was the optical counterpart of the neutrino impact event.

But...... What is that?

After another period of time, Chen Yue saw that Wang Liangsan's brightness had actually decreased again. After analysis, Chen Yue believed that it was a cloud of interstellar dust that blocked between Wang Liangsan and the solar system, making it darker.

But...... Where does interstellar dust come from? An interstellar dust cloud of such a small size and yet so dense? How is this possible?

Combining all the anomalous phenomena that had been discovered recently and connecting them together, Chen Yue came to a conclusion that made him a little heavy.

In Wang Liang's three-star system, a large-scale interstellar war is taking place.

Neutrinos of very high energy levels may come from the explosion of some kind of superweapon. Wang Liangsan's brightness increased, and it was very likely that that weapon affected it. Those interstellar dust, it is possible that they are the wreckage of shattered ships and planets.

This is the only possibility in the current situation.

Unexpectedly, he had just discovered a life like Mu Gongying on Europa, and had just come to the conclusion that "the universe may not be deserted", and it didn't take long for him to observe signs of war between advanced alien civilizations.

Especially when it's so close to me.

Chen Yue believes that since the warring parties can make such a big noise, then it is almost certain that they have mastered the technology of interstellar navigation. They have the ability to travel between different stars, so they must have the ability to come to the solar system.

Chen Yue felt that he couldn't imagine the vastness of that war.

What kind of war was that......

There was only one thing Chen Yue could know.

The scientific and technological strength of the warring parties must far surpass their own. Even if only one of their ships came by, they could easily destroy themselves. At this moment, the only thing they can count on is that they don't find themselves, or they are not interested in the solar system.

Don't come to the solar system.

A deep sense of crisis spread from the deepest part of Chen Yue's heart.

"Now I'm still too weak, and I don't have the slightest ability to protect myself. It is necessary to develop science and technology, to develop science and technology faster, and to control nuclear fusion...... Yes, controlled nuclear fusion! ”

Chen Yue secretly made up his mind.

We must master controlled nuclear fusion technology as soon as possible at any cost.

Because in his opinion, after mastering the controllable nuclear fusion technology, he can be regarded as truly having the ability to travel interstellar. At that time, even if he still can't protect himself, he will at least have the ability to leave the solar system and escape.