In recent years, the topic of aliens has been debated, although some people come up with so-called facts to prove the existence of aliens, but the convincing power is not strong, whether there are aliens or not, no one can say.

Human beings have always had a dialectical view of aliens, no one can treat unknown things with a normal heart, I don't know whether the other party's civilization development level is higher than that of the earth, and I don't know whether the other party is aggressive, everything is unknown.

The universe is so big, maybe some civilizations want to go out and see, civilizations can rely on their own scientific and technological strength to teleport across galaxies, but there may also be some accidents, the root of all this is the mysterious "wormhole" in the universe.

The concept of "wormhole" was put forward by the great physicist Albert Einstein in the 19th century, there may exist in the universe to connect two different space-time narrow tunnels, there are too many unsolved mysteries in the universe, although "wormhole" is only an imaginary concept, but one day has not proved that this is a fallacy, it has the possibility of existence.

However, the existence of aliens is still a highly controversial topic.

Among the theoretical conjectures about aliens, the most famous theory is the Drake formula, also known as the Drake equation, also known as the Sagan formula, or Greenbank's formula, later known as the "Green Bank formula".

Equation 1 is: N=Ng×Fp×Ne×Fl×Fi×Fc×FL

The number of civilizations in the galaxy that may communicate with us = the number of stars in the galaxy× the proportion of stars with planets× the number of terrestrial planets in each planetary system × the proportion of habitable planets with life evolution × the probability of evolving highly intelligent creatures× the probability of highly intelligent life being able to communicate× the proportion of the duration of technological civilization in the life cycle of the planet.

Thereinto:

N represents the number of civilizations within the galaxy that may communicate with us

Ng The number of stars in the Milky Way

FP stars have planetary proportions

ne Number of terrestrial planets in each planetary system

FL has a proportion of habitable planets where life evolves

The probability that FI will evolve into highly intelligent creatures

The probability that FC is highly intelligent and capable of communicating

fL Tech Civilization Duration as a Percentage of a Planet's Life Cycle

After thinking about it for a while, the observation activity was also coming to an end, and the president of the association made a summary of the observation activity, and also said that the observation activity was coming to an end, and Shang Yiyun was also very excited to watch the beautiful and charming planets in the universe.

The curiosity about aliens has also been rediscovered, but all this is unknown, and no one dares to say with great certainty that there is no extraterrestrial life in the universe, and no one dares to say with great certainty that there are aliens in the universe.

Walking out of the astronomical observatory of the Department of Astronomy of the School of Physics, Shang Yiyun's heart was full of longing, although he didn't know whether aliens existed or whether he loved peace, but the development of science and technology and the enhancement of scientific and technological strength were undoubtedly the most correct choice, no matter when, strength was fundamental.

Of course, all this has nothing to do with him at present, after all, his academic level has not yet reached the doctoral level, and let him be responsible for the research and development of controllable nuclear fusion technology, that is, the steps are a little bigger, and the meal must be taken one bite at a time, and the enhancement of scientific and technological strength also needs to be done step by step.

Recently, Shangyiyun has been researching 5G communication technology, one of the difficulties of this technology is a silicon crystal material, this silicon crystal is an excellent choice for manufacturing semiconductors, if you can develop germanium silicon and insulating silicon materials that meet the requirements of 5G communication, the research of 5G communication technology will go further.

He recalls that in February 2018, on the eve of Mobile World Congress, Vodafone and Huayun announced that the two companies had completed the world's first 5G call test in Spain using non-standalone 3GPP, the new 5G wireless standard and the Sub6 GHz band.

Now, it is 2017, that is, this technology is still under secret research, and he still has nearly five months to do so, as long as he strives to develop 5G communication technology during this time, and then write a paper and send it to the academic journal of Kyoto University.

However, today is Saturday, and tomorrow is the start of the National Day holiday, and he is going to spend a sweet National Day holiday with Chen Feiyun, so he is ready to pause everything and wait until he comes back from the National Day holiday to continue his research.

After all, for a while, he couldn't study anything, so it was better to relax, and thinking of this, he went back to the dormitory to pack his things.

Although Sunday is the start time of the National Day holiday, there will be no classes on Saturday, and many people will choose to leave school today, and Shangyiyun is no exception.

Yesterday, he had booked a high-speed rail ticket to the magic capital, which departed at seven o'clock in the afternoon today, and it took about twelve hours, and when he arrived at the magic capital, it was just dawn, so he didn't need to go to the hotel late at night, and it was just noon, and there was still a period of time, so there was no hurry.

When I returned to the dormitory, I found that Yue Xiaolei was packing things, but it was just loading things into a backpack, and the other party's home was in Kyoto City, and it wouldn't take an hour to go home, so I didn't need to bring too many things

"Feng Yu, Xiao Yue, aren't you two going to go out and have fun, stay in the dormitory for seven days, aren't you afraid of rusting?"

Hearing Shang Yiyun's words, Shen Fengyu was very helpless, he also wanted to go out to play, but he always felt bored alone, so he dispelled this idea.

"You guys have fun, you don't have to worry about the two of us, it's okay to stay in the dormitory for seven days. ”

"Alright then, since the two of you are not going out, let's take a good look at the dormitory, and when I come back, I will bring you some specialties from the Demon Capital. Speaking of this, Shang Yiyun said with a grin.

Tonight, he has to take a twelve-hour ride on the high-speed train, and he plans to catch up on sleep in advance this afternoon, so that when he is on the high-speed train, he doesn't need to sleep.

After packing up his things, he went to bed, in fact, there are not many things to carry, it is now October, and the temperature in the magic capital is not very low, so just bring some thicker clothes, and it is enough for the two of them to use a suitcase.

Lying on the bed, Shang Yiyun slowly entered the dream, slept until five o'clock in the afternoon, felt a little headache, and slept too long a day, and his body would protest.

Since the time was almost up, he went to Chen Feiyun's school with a backpack, his suitcase was relatively small, so the two decided to use Chen Feiyun's suitcase, at this time, Shang Yiyun's backpack only had two sets of clothes, a few changes of underwear, and then a few books, these books were all math books, and he was going to read on the high-speed train.

"Guys, I'm gone, don't think about me. ”