Deep Space Fleet

Zhang Yuan quickly established a mathematical model: "Consider the Milky Way as a plane, that is, R ^ 2. Consider one of the ships doing standard Brownian motion, or two spacecraft doing independent Brownian motion independently.

"When the distance between two spacecraft is less than a small constant, such as 0.01, it is considered to meet."

"Because the two-dimensional Brownian motion often returns in the neighborhood, as long as the time is long enough, the two spacecraft will definitely meet."

"Consider two independent standard Brownian motions A (t), B (t). A (1) + B (1) and A (2) are identically distributed, 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 frowned. "From the perspective of this simple model, the probability of observing an alien civilization with a moving spacecraft is twice as high as it is stationary. That is to say, assuming we can observe an interplanetary voyage once every 1300 years Civilization, it takes 2600 years for Earth civilization to observe it once. "

Lin Xuanxuan's small mouth opened slightly, which is just some information generated from nothing!

She was a little proud again, lamenting that she had a good vision.

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

"If interstellar civilization is not so rare, then this universe may be more exciting than we think!"

Of course, there are more than one smart person in the spacecraft. Just such a simple encounter, various ideas have emerged endlessly.

First question: How big is this alien spaceship and where is it going?

According to astronomical observations, it is at least as big as Mercury! And it is moving at 40% of the speed of light. The faint point of light is due to the friction between the ultra-high-speed moving hull and the micro particles in the universe, and then the light is generated.

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

Its direction of movement is approximately an angle of 123 degrees from the direction of the Earth's era. The destination is unknown. It must not be the earth or Glize 581 anyway.

Seeing this, Zhang Yuan let go of his heart slightly, it had nothing to do with their destination anyway. .

The second question, did the alien spaceship find Earth Age?

Probably not. The Earth Age is still too small. In the dim universe, five fingers can be seen without a hand. Without external electromagnetic radiation, it is difficult to find an object 0.12 light years away.

However, the other party once sent a series of short signals, and they did not know whether it was directed or sent in all directions.

Zhang Yuan clicked on this series of signals, which had about six hundred bytes, and there were repeated peaks and troughs, indicating that it was a logical electromagnetic signal.

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

Then there is no more. Even if the other party reports goodwill, humans dare not make bold observations, let alone write back letters or scan them with radar. Besides, the Earth Age's radar cannot scan anything outside 0.12 light years.

Zhang Yuan felt a little regretful that there was never a lack of material in the universe, and the most precious thing was information. Humans who have never interacted with interstellar civilization, missed this time, next time I do n’t know if they want monkeys, monkeys ...

There are indeed many of the same points in the post below.

[This civilized technology is definitely better than us. 】

[So sure, don't you see a planet-level spaceship? There should be no way to accelerate this planet to 40% of the speed of light using nuclear fusion ...]

[I think it uses vacuum zero energy, or black hole energy. It may be an anti-gravity propulsion device. We do not seem to see the plasma flame at the jet. 】

[If only a little more observation data ...]

After all, I haven't felt the fear from the unknown. In these more recent posts, people's thoughts are indeed more optimistic and open. Zhang Yuan, who has seen a variety of discussions, is a bit itchy and wants to express his own opinions.

"Look, confiscated!" Lin Xuanxuan snatched his cell phone. "Here it is today, the patient must be like a patient. I will not care what you want after you leave the hospital."

One week later, Zhang Yuan was officially discharged from the hospital and began normal work.

He is already a high-level manager, and with the aging of the spacecraft, he no longer has a lot of his own time as before.

His work has become more busy, and basically every week, manpower is organized to maintain the entire spacecraft.

Moreover, in addition to the alien spacecraft that happened to be encountered, Zhang Yuan also learned that there are other stories that have happened in the past hundreds of years ...

Nothing is good.

The first thing, the old captain left the spaceship he loved three years after his hibernation.

The successor is Captain Lin of the Scientific Council.

Even if I have experienced this many times, even if I am prepared psychologically, I still feel uncomfortable ~ www.readwn.com ~ With the eyes open and eyes closed, some people have disappeared ...

The second thing is, unfortunately, since the death of Mr. Aiding on the earth, the spacecraft has completely lost contact with the earth.

No other great man of the same age has appeared.

How the earth's civilization is going is already a complete unknown.

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

...

One year passed quickly, and one by one was sent away, and then it was time to eat casual meals and hibernate again.

The only real companion who can accompany him for a long time is Lin Xuanxuan.

While eating, Zhang Yuan suddenly felt that it was really nice to have someone who was always with him ... without this life partner, life would be even worse.

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

"Me? An uncle who is more than 1,300 years old, why?" Zhang Yuan just buried himself to eat.

"Real age!"

"... 30?" Zhang Yuan calculated carefully, and suddenly found himself already thirty years old. And it happens, today is my birthday. In this environment, he really can't tell the passage of time, and he never has the habit of birthday.

"Uncle 30, happy birthday!" Lin Xuanxuan found a red apple and handed it to him.

"Thank you for this beautiful young lady ... and your temperature!" Zhang Yuan joked. With the habit of making troubles, you will always have a sense of instinct, like a real loved one.

(How come there are so many people in the book review area who say I'm water, and there are several more by one person? There is nothing to say ...)

(What else is required for fast-paced, relaxed spirit? This is not a little white, my reading object has never been white, okay.)