Voyage of the Stars

When humans continued to embark on the star road and were on the last 347 light-year journey, the Tianqin received a message from the outer exploration spacecraft team of the Grand Fleet. Because the Grand Fleet was sailing at warp speed, the message was not transmitted by electromagnetic waves, but by tachyon communication, which can only be mastered by Level 4 civilization.

Today, the human communication system has been completely upgraded, and the communication between each spacecraft and warship has been replaced by tachyon communication, but the traditional communication system has not been completely abandoned, and it is still used inside each ship.

Like the network system inside humans, it is actually included in the traditional communication system. It is really that the communication system in traditional electronic technology is too convenient, and there is no delay problem when used inside the spacecraft.

As for the communication between spacecrafts, there is no way. It is not that traditional electromagnetic wave communication will fail after the spacecraft enters the warp speed. After all, both spacecrafts are in the warp speed. From the perspective of light, the two spacecrafts are actually stationary.

The trouble lies in the communication between the spacecraft in the warp speed and the spacecraft not in the warp speed state. This traditional optoelectronic communication cannot be solved, and only tachyon communication can be used.

Therefore, the communication form of human civilization today is a combination of the two. Tachyon communication is used between ships, and traditional electromagnetic waves are used inside. As for why tachyon communication is not used inside ships? The reason is very simple. Humans do not have tachyon conductors as lines like photoconductors.

However, when the signal was transmitted to the Tianqin, the scientists who saw the signal form were also a little confused for a while. Because they had no idea what information was carried in the signal, they only knew that it was definitely not a signal form that could appear in nature.

Because according to the report of the detection spacecraft team, they did not receive electromagnetic wave signals, but tachyon signals of tachyon communication.

Those who are familiar with the four fundamental forces know that only electromagnetic force and gravity are long-range forces in the macroscopic universe, so there are only two types of waves that can propagate in the universe, namely electromagnetic waves and gravitational waves.

The propagation of tachyons is not in the form of waves. It is just a superluminal particle that carries identifiable information. Its detection mechanism is a bit similar to neutrino detection. But its mechanism of action is very different, or the range is wider, which is also the reason why it can be used for tachyon detection.

The basic principle of tachyon detection is somewhat similar to the detection principle of radar electromagnetic wave reflection. It also shoots tachyon streams from the warship into the universe, or directional release. After all, tachyons themselves are faster than the speed of light, and no force is needed to occur.

These diffused tachyons will encounter various things in the universe, such as planets, spaceships, molecular clouds, gravitational waves, etc. Yes, it can also reflect back gravitational waves that belong to space-time fluctuations, and the reflectivity is stronger than other objects.

This tachyon used for communication and detection seems to be very sensitive to changes in space and time. Humans don’t know why, but they only know that this is the effect.

The tachyons acting on macroscopic objects will be captured by receivers belonging to the same detector system after reflection. These reflected tachyons will have different spin properties because of the different objects they touch. Humans realize tachyon detection by detecting these properties.

The magical thing is that this touch reflection will not affect the macroscopic object, and there is not even a pressure similar to "light pressure", so a spacecraft without a tachyon detector installed will not realize that it is being detected by tachyons.

Tachyons seem to be closely related to gravity among the four fundamental forces. They are born from the grand unified force field, but their reaction to electromagnetic fields is not as strong as that to gravitational fields.

Therefore, tachyon detection can clearly detect stars in the space ahead, while it is more difficult to detect objects like spaceships, and the farther they are, the more difficult it is. For example, the current tachyon detection technology of human beings can achieve almost zero-delay communication across a distance of 2 light years for communication, but it will be halved for detection because tachyons need to return.

If it is farther away, the tachyons generated by humans will be distorted, and no information can be obtained from its properties.

So generally speaking, receiving a tachyon signal basically means that the party that sends the tachyons is within 2 light years of the receiving party, if the other party's tachyon technology is as advanced as that of humans.

Because humans can't receive tachyon signals if they are farther away. This is another characteristic of tachyons. The distance they travel in the universe is positively correlated with the strength of the grand unified force field that generates them. Once they exceed their fidelity distance, they will disappear directly in the universe, as if they have returned to the universe itself and been absorbed by the space itself, and there will be no trace of them.

And precisely because tachyons have such properties, they are not suitable for cosmic broadcasting, unless there is a very powerful tachyon generator that can reach thousands of light years, but just think about it and you will know that this is unlikely.

Although human technology has not gone far in the field of tachyons, combined with their understanding of the background of the universe, they know that it is impossible. Because if there is such a powerful tachyon detection, it means that a level 4 or 5 civilization has the ability to clearly detect things in the area of ​​thousands of light years around itself. With this ability, those low-level civilizations and life planets have long been swept away, and there is no opportunity for development.

Therefore, the possibility of tachyon broadcasting is not great, and for this reason, humans were really shocked after receiving this message that was obviously sent by intelligent life.

Judging others by one's own standards, two light years is really too close.

If the unknown civilization that sent the tachyon signal is just ahead, then at the current speed of human navigation, it will collide head-on in two months.

Knowing the seriousness of the situation, as soon as the information from the detection spacecraft was received, the relevant scientists on the Tianqin and other warships and research ships immediately returned to their jobs and analyzed the unknown information immediately.

The first is from which direction the information source comes.

The tachyon has a strong directionality. The signal source must come from the direction in which the detector of the human detection spacecraft receives the signal. This is easy to judge.

It comes from the side and front of the direction of the human fleet's advance, with an angle of about 45 degrees.

Tachyon detection is very convenient and can detect information outside the light cone, but there is also a disadvantage, that is, if the opponent is a fleet, then when you detect the opponent, the opponent will also know your existence, which is equivalent to both parties being lit up in the opponent's radar at the same time.

Of course, if the opponent is a detector, then the human beings who are lit up now should only be the detection spaceship team that received the tachyon signal, because the main body of the human fleet is a certain distance away from the detection spacecraft and has not received the tachyon signal.

Humans who looked at the tachyon signal soon discovered the strangeness of the signal. It was segmented, and there was an obvious time interval between each segment, but the length of each interval was different. The reason for this signal was that the tachyon transmitter did not emit tachyons continuously, but fired and stopped, fired and stopped in a cycle.

This emission form seemed to be intentional, because tachyon detection does not require such emission. Humans who saw this signal form felt that it was more like a signal form of 1 and 0, rather than a continuous tachyon signal of tachyon detection.

What does it mean?

Human scientists were a little confused.