Chapter 556 Notice

Before gravitational waves were confirmed, almost all knowledge of astronomy by all civilizations was obtained in the form of electromagnetic radiation, whether it was starlight, radio or microwave signals from deep space.

When the detection methods were expanded and gravitational wave detection was realized, people saw a new universe.

Humans have mastered this technology, but from beginning to end, they have only passively and indirectly detected it, and the equipment is very primitive, well, very primitive for advanced civilizations.

Human laser interferometer space antennas can detect gravitational waves, and can only passively detect gravitational waves transmitted to their own location, while those level 6 civilizations in this universe are different. They can actively detect gravitational waves that are still outside the light cone for them.

This is the case with the Galactic Center Alliance, the Silicon-based Consortium, and the Awakeners who are now looking for something in the Milky Way.

The Awakeners have been in the Milky Way for some time. Their rectangular battleships, in groups or individually, slowly spread around from where they arrived in the Milky Way, and at the same time use this detection method to detect possible wormholes in space.

The star gate that led them across the Milky Way to the Milky Way was found in this way, so after arriving in the Milky Way, they also looked for it in this way.

However, the vastness of the Milky Way is comparable to the Triangulum Galaxy, and the awakeners cannot explore the Milky Way as freely as they did in the Triangulum Galaxy, so their exploration progressed very slowly.

Several dead wormholes were detected, but none of them were traces left by the so-called previous generation of voyagers.

Year after year, the most covert activities were eventually discovered. The first to encounter the awakeners was the Perseus Community, but that fleet was wiped out by the awakeners, and now it is the Galactic Heart Alliance.

The Galactic Heart Alliance's concealment technology is obviously much better than that of the Perseus Community. After they discovered the awakeners and started their plan, the awakeners still did not realize that they had been targeted.

It was not until the Galactic Heart Alliance began to act and really spread the news that an extragalactic civilization had visited the Milky Way that the awakeners noticed it.

But at this time, the harvesters also got the news.

"I found such news in the gravitational wave broadcast information of certain space nodes." At about the same time, a message appeared in the internal communication channel of the awakener civilization.

The internal communication of the sixth-level civilization is obviously real-time communication, and the message said that it was found from the gravitational wave broadcast information, which is also very obvious, that is, the information selected from many gravitational wave broadcasts.

People know that the Milky Way is vast and boundless, and the propagation speed of gravitational waves is not infinitely fast, but the same as the speed of light, so even a sixth-level civilization cannot violate the laws of physics and broadcast gravitational waves to the entire Milky Way at once.

In the sixth-level civilization, the so-called concept of gravitational wave broadcasting is different from that of low-level civilizations such as humans. Broadcasters do not need to wait for gravitational wave oscillations to spread to the entire Milky Way. They only need to increase the intensity of gravitational waves to ensure that other sixth-level civilizations can detect them within a certain width.

The Galaxy Heart Alliance used this method to spread the news that the awakener came to the Milky Way. They used their own small universes in various parts of the Milky Way as nodes and dispatched spacecraft to spread the news in every corner of the Milky Way.

If there is no detection method outside the light cone, then these gravitational waves will take countless years to enter the laser interferometer space antenna of civilizations such as humanoids and be captured. Of course, by then, the information may not be true, because the gravitational wave signal will decay with the increase of distance, until the information is distorted and nothing can be detected.

If a civilization that has never discovered aliens receives this distorted gravitational wave signal, it may set off a wave of searching for aliens.

Although this form of broadcasting and receiving broadcast information seems passive, it is true that the receiving party cannot discover it in time if it does not actively detect it. But it is obvious that the Galactic Heart Alliance is not worried that no civilization will receive it.

Their small universe strongholds scattered across the cantilevers of the Milky Way are one thing, and the basic self-defense safety awareness of level 6 is the key.

The Galactic Heart Alliance is very sure that no level 6 civilization in the Milky Way dares to wander in the universe without opening the means of long-distance detection. It is the same as marching without scouts, which is purely a suicidal act.

The same is true for the reapers, but there is a difference in that the reapers are looking for these hidden civilizations.

At this time, in the internal channel of the awakener, the long-distance communication information is still going on.

"A civilization from the extragalactic galaxy. The time of arrival in the Milky Way, the characteristics of the warships, the approximate activity area. The evaluation of the existence of special technologies shows that it is us."

"We have been discovered. Did the fleet we encountered at the beginning not deal with it cleanly?"

"No, I believe in the ability of "You", and he will not joke about such things. It is not that fleet, but other civilizations in the Milky Way."

"It seems that the water in the Milky Way is much deeper than we imagined."

"After all, it is a big place, and it is normal to have hidden dragons and crouching tigers."

"Isn't that just right? If they are all as weak as the fleet of the Perseus Community, then our trip to the Milky Way would be too boring. Now a challenging civilization has finally emerged. I don’t know if it is the Galactic Heart Alliance or the Reaper, or some silicon-based consortium."

"It doesn't matter which one. The Perseus Community was able to appear together in the broadcast that year, which means that they are all civilizations of the same level. Even if they are slightly stronger, they are probably not much stronger. In my opinion, you are just too cautious. If You can kill their fleet alone, we can do it too. Even if it is another stronger civilization, our fleet of warships will always be no problem."

"No, it's different. The fleet that You encountered at the beginning did not find any traces of their special technology, otherwise their combat effectiveness would not be so weak. We still have to be careful. After all, the main purpose of our coming to the Milky Way is to find traces of the previous generation of voyagers."

"That's what I said, but judging from the current situation, we have obviously been exposed. It is no longer possible to explore quietly like before. Contact is inevitable, and those civilizations in the Milky Way will definitely intervene."

"Then what do you think we should do?"

"What to do? Just do it. Since we have been discovered, we must take the initiative to attack and give a heavy blow to the civilization that is targeting us, so that they know that we are not easy to bully. Otherwise, we will only face endless harassment in the future, which is even more detrimental to our exploration. It is better to put it in the open."