Who is it? Who is it? Who is it!?

Where is it? Where is it? Where is it!?

Noah's heart at this moment has been completely filled with these two questions. Pen ~ fun ~ pavilion www.biquge.info

Could it be that there are still humans who have survived!? Or will it be an existence similar to oneself left over from the earth's civilization!?

Noah's mood swing values kept soaring, and it wasn't until he touched the emotional safety line that Noah woke up from the calm cues.

Being able to use Morse code proves that the other party must have a good understanding of the previous earth civilization, and the other party can use the interference graviton transmission method to send a distress signal, and the other party's technology level must not be low.

In this way, two basic conditions are born:

1. The other party knows the earth civilization very well.

2. The other party has a certain scientific and technological strength.

Reasoning based on these two basic conditions, Noah slowly calmed down. There are three possibilities.

1. The other party is human.

2. The other party is a creation of the same earth civilization as himself.

3. The other party is the Kara civilization, which has been observing the civilization of the earth for a long time.

Noah immediately analyzed the three possibilities that had been drawn.

If the other party is really a human being, you must know how long it has been since the extinction of human beings, without the support of the earth, can humans at that time really hold on to the universe for so long? Perhaps the other party has also ushered in a technological breakthrough and can already achieve interstellar travel...... But the probability is not high, the survival ability of human technology in the universe at that time is far from enough, and Noah does not think that it is possible for humans to escape the radiation of gamma-ray bursts.

If the other party is a creation of the earth's civilization like himself, then what will the other party be? Artificial intelligence? can develop independently and send distress signals, no matter how you look at it, it has reached a certain level of intelligence, and may not even be inferior to Noah...... But the probability is not high, Noah knows human civilization very well, and knows that humans have not created anything that can replace themselves except themselves.

If the other party is the Kara civilization, then this distress signal must be sent to themselves, because they know that only they can understand this universe except for the previous earth civilization, and the other party has this scientific and technological strength, maybe the other party can go further than themselves in the field of gravity, and can interfere with graviton transmission in the light grade range...... But the possibility is still questionable, and the Kara civilization asks for help from itself? Why did they call for help? Their technological strength is definitely higher than their current self, and if they encounter difficulties that even they have to ask for help from the outside world, Noah doesn't think he can help.

None of the three conclusions inferred above are very probable, which makes Noah have to think about some other questions, perhaps, this could be a trap?

A distress signal in human language, and then lure yourself into a trap?

Good rough trap......

But it works.

Whatever the possibility may be, Noah will have to investigate it.

However, Noah did not know where the source of this distress message was, and the other party was not sending electromagnetic waves, but some special force that could interfere with gravitons, and Noah had not yet come into contact with this means of communication.

"Is this gravitational wave communication, like in the science fiction works of the old days?"

Noah muttered to himself that gravitational waves are not exactly a product of science fiction, but first originated from Einstein's conjecture, who said that three-dimensional space is inherently elastic and that it vibrates with one-dimensional time. This vibration will induce a wave that resembles ripples on the surface of water throughout the space, which is called a gravitational wave.

Although gravitational wave communication can not achieve the security and faster-than-light communication like quantum communication, gravitational wave communication is better than its indifference, and electromagnetic wave communication, the transmission of gravitational waves is no difference, each communication is equivalent to sending a broadcast, the receiver can receive the information as long as it is in a specific band, and compared with electromagnetic wave communication, gravitational waves are difficult to interfere with, and will not be affected by natural phenomena such as stellar winds, the most important thing is Gravitational wave communication can achieve light-grade communication under normal conditions.

Quantum communication is like two people who are thousands of miles apart each holding a walkie-talkie and communicating like a phone call, and no one else can hear their conversation. Gravitational wave communication is equivalent to two people holding a super megaphone, and while the other party hears it, other people in this range can also hear it.

Although gravitational wave communication is far less secure than quantum communication, it does outperform quantum communication by a lot in terms of transmission range.

On the premise that this is gravitational wave communication, Noah began to arrange graviton transfer measurement devices at various locations in the galaxy, and a total of 12 devices are distributed on the rings around the galaxy.

The speed of gravitational waves is still the speed of light, and it is possible to determine the direction in which the source is transmitted by observing the time difference of graviton changes with devices distributed throughout the galaxy.

The gravitational wave distress signal, which would be broadcast every hour, became a very bright signpost for Noah, and the first time the signal was received, it was roughly deduced that the source of the transmission came from the direction of Sirius in the constellation Canis Major and the middle of South Gate II, and Noah gathered all the graviton observation devices in that direction to further pinpoint the location.

After five precise fixations, Noah could determine that it was pointing to South Gate 2, but with a 7.5-degree offset towards Sirius.

This direction, which is quite far from the solar system, is it really not the Kara civilization?

After the direction was determined, with doubts, Noah began to count troops.

War spaceships set sail from the space port to the extragalactic rendezvous point.

The South Gate II Expeditionary Corps consists of 3 Delta-class aircraft carriers, 5 Delta-class warships, 30 Gamma-class aircraft carrier warships, 90 Beta-class warships, 200 Alpha-class warships, and 1,300 frigates.

These ships form a very perfect fleet battle group, with a reasonable distribution of ships of various sizes and a reasonable combination of the number of various ships, which can maximize the combat ability of each spaceship in the universe.

Although it is only a small part of Noah's fleet, just such a military force is enough to easily destroy the earth civilization in the 23rd century.

The impulse engine was running at full power, and countless blue-and-white fires erupted from the tail of the Expeditionary Legion spacecraft, and the ships soon sailed at near the speed of light and left the Gliese 581 system.

Although Noah determined the direction of the signal source, he did not know how far away the signal source was from him, and the expeditionary corps continued to receive gravitational wave signals that would be sent every hour while advancing, and relied on this signal to constantly fine-tune the course.

Although the impulse engine can approach the speed of light infinitely, it also takes a long time to travel at the distance of light grades.

The distress signals that will be sent every hour during this period have not been interrupted, and Noah has received them every time, and the girl was looking forward to whether there would be other messages to be transmitted, but to Noah's disappointment, every time it was the simplest SOS.

Can't the person sending this message be a little different? Such a simple thing, Noah doesn't want to believe it's a trap.

It wasn't until a year later that the distress message finally began to change, but not because the content had changed, but because the time interval between sending it had changed from once an hour to once every few months.

Ten years later, Noah's fleet had sailed ten light-years away, and while this was not yet the closest system to Gliese 581, some information from the expeditionary force had Noah start to pay attention.

That's gamma rays, there is a certain intensity of gamma radiation shining into the fleet, gamma rays do not necessarily come from gamma ray bursts, it is also likely to come from laser weapons, in laser weapons, gamma rays themselves are unique because of their powerful energy and penetrating power, and its own powerful lethality to the structure of life cells is also a weapon that is very commonly used in Noah's model of war against carbon-based life.

There is no such irregular distribution of gamma radiation in the universe, and there must be something interesting in the direction in which the fleet is heading.

Finally, another five years later, the fleet has left the Gliese 581 system for 15 light-years, and at this moment, the fleet's probes have finally detected something massive again in the void universe.

As the fleet progressed, the number of individuals with mass gradually increased, and in Noah's field of vision, some unrecorded red dots could be seen entering the fleet's detection range.

There are more and more of them, and they can even rival Noah's expeditionary legion.

Noah hesitated a little, what would be in front of him, with such a scale, if they were all high-civilization ships, the expeditionary legion might not be able to get benefits.

The other party also seemed to detect the existence of the expeditionary legion, and Noah only realized at this time that the other party was also moving in this direction, and the two were less than 0.01 light-years apart, and they would meet soon.

Noah gritted his teeth, it's all here, do you want the expeditionary legion to come back?

The distance of 0.01 light-years is rapidly reduced between two targets traveling near the speed of light.

Soon, they were at a distance that Noah could directly observe.

Noah saw that it was also a fleet, and the shape of the spaceship made Noah feel extremely familiar, although it was not the same as the leftover spaceships of the previous Kara civilization, but it could be seen that they were all from the same spaceship production system.

The other party doesn't seem to have any intention of concealing it, so that Noah can clearly see the formation of their fleet, and the number of spaceships detected is 4311, which is about 3 times the number of ships of the South Gate 2nd Expeditionary Legion, and there are more large warships built in the Gamma-class ships or above, and there are 10 spaceships that are obviously flagships, and the construction scale even surpasses the Delta-class spaceship, almost to the point of Noah's main ship, Ark (Ark), and a spaceship that is protected by all fleets, The scale of construction even far exceeds that of the Ark, which should be the main ship of this fleet.

But to Noah's surprise, most of these ships were painted, and many of them even reached the point where they needed to be dragged by other ships in the form of sparks and black smoke.

Could it be that other civilizations are at war with the Kara civilization? Is it true that advanced civilizations are common in the universe? Then why has he not been able to receive signals from other civilizations after thousands of years of development in Gliese?

Noah's doubts have not been answered, the other party has already sent a connection request, which is the most basic radio communication, Noah hesitated a little, but still connected it.

The message is still the most common English on the planet in the past.

[We are the orthodox government of the Kara civilization, thank you for coming to lend a hand, good earth civilization. 】