This urgent message was sent by Sergei, the military commander in charge of the specific navigation tasks of the expeditionary force fleet, and in the entire expeditionary force fleet, only a few senior commanders had the authority to communicate directly with Yuan Chen. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

"Received a faster-than-light electromagnetic signal with remarkable regularity!!" Yuan Haochen was also shocked when he saw the message.

"Don Quixote, follow me to the command center immediately!"

"Yes!"

Although Don Quixote didn't know why, he still followed Yuan Haochen out of the super laboratory without hesitation.

The scientists present were still immersed in the joy of achieving a breakthrough in the decay technology of heavy elements at the last moment, but at this moment they were left on the scene by the commander, and they were all stunned.

In the command center of the expeditionary fleet, the military commander Sergei, the commander of the engineering department, Tesla, the deputy commander of science, and Wang Yao, had already gathered and waited for Yuan Haochen's arrival.

"Leader!"

"Hello!"

When Yuan Haochen stepped into the command center, everyone greeted him one after another.

Yuan Haochen nodded and immediately asked, "What's the specific situation?" Play back the signal you receive! ”

"The signal is about 21.8 seconds long and travels faster than light, which is 18 times the speed of light in three-dimensional space, which is slightly slower than our communication speed......

“@￥%￥%￥%！ @#！ @#！ @！ @#......”

While Sergei was talking, the communications officer had already simulated the captured signal.

"It is indeed different from the cosmic noise received in the past, and there is an obvious regularity!"

Yuan Haochen immediately made a judgment after reading the data of this signal, and he very much agreed with the conclusion of the communications department.

"The frequency and band of the signal are significantly different from ours, and we can't decipher the meaning due to the signal duration and lack of information." Sergey continued.

"Can you roughly determine the direction of the signal source?" Yuan Haochen asked.

The expeditionary force successfully developed and applied faster-than-light communication technology in four-dimensional space 20 years ago. In order to meet the needs of faster-than-light propagation, the power of the emitted signal must be large enough, and the requirements for directional propagation of electromagnetic waves will also be very high, otherwise the attenuation loss of electromagnetic waves in space will be more significant, and the distance of signal propagation will be limited.

It is precisely because of the precise requirements of signal directional propagation that it is easier to judge the general direction of the signal source.

"The direction of the source is within +-18.5 ° directly in front of the fleet's route." Sergei replied in a loud voice.

"What is the distance forecast from the fleet?" Yuan Haochen continued to ask, this is a difficult problem.

"This ......, I can't judge!"

Sure enough, Sergei couldn't answer this question, and he quickly turned his head and gave the communications officer next to him a look, but the communications officer only shrugged helplessly.

"Tesla! You should have an idea. Yuan Haochen turned around, looked at Tesla, the commander of the engineering department standing in the corner, and asked meaningfully.

"Ahh Leader, wait a minute, let me think about it......" Tesla didn't expect that he would be named and asked questions when he stood in the corner, and he was stunned at the time.

"Okay, I'll give you 30 seconds, and I'd like to hear your analysis from a technical perspective." Yuan Haochen said.

"Yes! Leader. Tesla's eyes lit up and he quickly replied, "Oh, there is, there is." ”

"Since the signal also travels at the speed of light, we can refer to our technical parameters to analyze the strength and attenuation of the signal, so as to roughly judge the distance the signal flies." Tesla nodded frequently, his eyes turned quickly, "We can accelerate the electromagnetic wave to 20 times the speed of light, and the speed of the other party's propagation is 18 times the speed of light, so well, I think the power of their equipment will be correspondingly lower, through the year-on-year conversion, this this, that who, show me the parameters of this electromagnetic wave......"

"What's your prediction in the end?"

Yuan asked, and the others were also staring at Tesla, waiting for his answer.

"Don't worry, there is, there is." Tesla wiped the sweat stains on his forehead, "This is a crude value, about 80~120 light years away from the fleet." ”

"Good! Well done. Yuan Haochen patted Tesla's shoulder, smiled and praised.

"So, let's talk about who, or what object, emitted this signal from 100 light-years away, and what does this signal represent?" Yuan Haochen looked around at everyone and continued to throw out a few important questions.

Since the invention of radio in 1895 by the Italian scientist Marconi, humans have been broadcasting to the vastness of space, even launching the Beatles' song "Through the Firmament" to the North Star, hoping that one day, an extraterrestrial civilization somewhere in the universe will be able to listen to it and respond to us.

Although the first radio waves emitted by humans on Earth have spread and propagated in all directions in the universe for more than 300 light-years, the range of these radio waves is limited compared to the radius of more than 50,000 light-years in the Milky Way.

The most critical point is that with the technological strength of human beings at that time, the power of the radio waves emitted was really small and pitiful, and it could not travel too far at all, so it was attenuated early.

Therefore, human civilization has always been able to listen to all kinds of noises from the universe and lament its own insignificance, sadness and loneliness.

"Leader, although everyone thinks that this signal is very likely to come from some unknown cosmic civilization. However, it is possible that the source of this signal is a particular pulsar. "Just as we have monitored and discovered many fast radio bursts (usually only a few milliseconds in duration, and the energy emitted by the eruption is equivalent to the energy released by the sun in a month, and each radio burst covers a certain range of radio wave frequencies, as if the entire FM band is playing music), perhaps a new pulsar or other celestial body will also emit a certain pattern of electromagnetic waves." ”

"Even if it is possible for a natural celestial body to emit a regular electromagnetic wave signal, does it really have the ability to emit faster-than-light signals?" The scientific deputy commander Lola, who has successfully developed faster-than-light communication technology, questions Don Quixote's views.

"We have not had the opportunity to observe pulsars and other celestial objects in four-dimensional space before, so naturally we cannot detect the faster-than-light signals emitted by her, at least we have no direct evidence to judge that natural celestial bodies cannot emit faster-than-light signals." Don Quixote continued.

"There is a certain possibility of your point, and if so, then the distance between the source and the fleet cannot be measured according to Tesla's method." Lola glanced at Tesla and continued, "All things considered, the probability that this signal came from some unknown cosmic civilization is still the most probable. ”

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(To be continued.) )