Deep Space Planet Leader

Zhang Yuan quickly established a mathematical model: "Think of the Milky Way simply as a plane, or R^2. Consider one of the spaceships doing standard Brownian motion, or two Spaceships do independent standard Brownian motions.

"When the distance between two spaceships is less than a small constant, such as 0.01, they are regarded as meeting. "

"Since the two-dimensional Brownian motion recurs in the neighborhood, as long as the time is long enough, the two spaceships will definitely meet. "

"Consider two independent standard Brownian motions A(t), B(t). A(1)+B(1) and A(2) have the same distribution, because B(2)=B(1)+[B(2)-B(1)], which is also the sum of two independent standard normals. This means that the distribution of the sum of two independent standard Brownian motions at time t is equal to the distribution of a standard Brownian motion at time 2t. "

Zhang Yuan frowns said: "Considering from this simple model, the probability of observing an alien civilization in a moving spaceship is twice that of a static one. In other words, assuming that we can observe a civilization capable of interstellar voyage in an average of 1300 years, the Earth civilization needs 2600 years to observe it once. "

Lin Xuanxuan's small mouth opened slightly, this is simply some information generated by create something from nothing!

She is a little proud in her heart, secretly sighed, she has a good vision.

p>

Soon, Zhang Yuan shook the head. This is just a simple model. In addition, there are too few samples. The real situation and the estimate must be very different.

"If the interstellar civilization is not so Rare, then, this universe may be more exciting than we thought! "

Of course, Zhang Yuan is not the only smart person in the spaceship. With such a simple encounter, various ideas have emerged.

First question: This alien ship How big is the spaceship, and where is it going?

According to astronomical observations, it is at least the size of Mercury! And it is moving at 40% of the speed of light. The faint spot of light is due to the super-fast moving hull. The rays of light are produced after friction and collision with trace particles in the universe.

Because of the extremely high speed of navigation, the observed image is like noodles, which is stretched a bit.

p>

Its direction of movement is approximately at an angle of 123 degrees with the direction of Earth Era. The destination is unknown. Anyway, it is definitely not Earth or Gliese 581.

See Here, Zhang Yuan relaxes slightly, anyway, it has nothing to do with their destination, like...

The second question, alien spaceship, did you find Earth Era?

Probably not. Earth Era is still too small. In the bleak universe, you can’t see your fingers. If there is no external electromagnetic radiation, it is difficult to find an object 0.12 light-years away.

But the other party has been I sent a series of short signals, and I don’t know whether it was sent directionally or in groups to all directions.

Zhang Yuan clicked on this series of signals, which are about six hundred bytes, and there are many crests. And the trough is repeated, indicating that it is a logical electromagnetic signal.

Unfortunately, because the amount of data is too small, it is simply impossible for people to decipher these alien characters.

Then There will be no more. Even if the other party reported good intentions, humans would not dare to make observations. It is even more impossible to write a reply or scan it with radar. Besides, Earth Era's radar is also impossible to scan things 0.12 light-years away. .

Zhang Yuan feels a bit regretful. There is never a lack of matter in the universe. The most precious thing is information. Human beings who have never interacted with the interstellar civilization have missed this time. Next time, I don’t know how to be the year of the monkey. ……

There are many similar views in the following post.

[This civilization's technology is definitely much better than us.]

[ That’s for sure. Didn’t you see that it’s a Planetary Grade spaceship? There should be no way to accelerate this kind of planet to 40% of the speed of light by using nuclear fusion...]

[I think it is Vacuum zero point energy, or black hole energy. It is also possible that it is an anti-gravity propulsion device. We don't seem to see the plasma flame at the jet. 】

[If only a little more observational data is enough...]

After all, I have never felt the fear from the unknown. In these recent posts, people's thinking is really more Optimistic and open, Zhang Yuan, who has seen various myriad discussions, is a little itchy in his heart and wants to express some of his own opinions.

"Look up, confiscated!" Lin Xuanxuan snatched his mobile phone, "I'm here today, and the patient must look like a patient. Whatever happens after you leave the hospital, I will No matter."

One week later, Zhang Yuan was formally discharged from the hospital and started normal work.

He is already a High Rank manager. With the aging of spaceship, he no longer has a lot of time for himself as before.

His work has become more busy, basically every week, he will organize a manpower to maintain the entire spaceship.

Furthermore, apart from the alien spaceship that he encountered by chance, Zhang Yuan also learned that some other stories that have happened over the past few hundred years...

are nothing Good thing.

First thing, the old captain left the spaceship he loved in the third year after his hibernation.

The successor is Captain Lin of the Science Council.

Even if I have experienced this feeling many times, even if I am mentally prepared, I still feel uncomfortable.

When you open your eyes or close your eyes, some people have disappeared...

The second thing, unfortunately, since the death of Mr. Edin on Earth, spaceship They completely lost contact with Earth.

There will never be a great man of the same era.

What happened to Earth civilization is already a complete unknown.

Zhang Yuan sighed long and devoted himself to his work......

......

One year passed quickly and sent away Colleague after colleague, it was time to have a farewell dinner party, and hibernation again.

The only person who can accompany him for a long time is Lin Xuanxuan, his life partner.

While eating, Zhang Yuan suddenly felt that it is really nice to have someone who has been with him... Without this life partner, life might be worse.

"...How old are you this year?" Lin Xuanxuan asked.

"Me? Uncle over 1,300 years old, what?" Zhang Yuan just buried his head in the meal.

"True age!"

"......30?" Zhang Yuan calculated it carefully, and suddenly realized that he was already thirty years old. And it just so happens that today is the birthday. In this environment, I really can't distinguish the ebbing of time, and he has never had a birthday habit.

"30-year-old uncle, happy birthday!" Lin Xuanxuan took out a red apple and handed it to him.

"Thank you for this beautiful little elder sister...and your body temperature!" Zhang Yuan played said with a smile. Getting used to playing and making trouble will always give birth to an instinctive sense of randomness, just like a real relative.

(Why there are so many people in the book review area who say that I am watery, how many of them are posted by one person? There is nothing to say...)

(What else is required to be fast-paced and relaxed This is not a Xiaobai novel in the first place, my reading object has never been Xiaobai, OK?)