Deep Space Fleet

In the dead of night, two young people were frantically brushing up questions.

Li Zhendong was very angry, really angry, every time he was surpassed by Zhang Yuan, he had to work hard again to surpass him.

Working hard, for him, is a very painful thing.

In particular, this guy is doing the junior high school Olympiad questions while giggling happily, what is this?

Is it human who can still do the junior high school Mathematical Olympiad questions happily like a fairy?

After grabbing a handful of hair, Li Zhendong felt irritable. The various characters in the book were like fleas, jumping here and there. After reading for a long time, he didn't know what he was talking about.

I can't calm down and stop watching.

Another glance at Zhang Yuan's question: "Prove: 2 to the nth power is an irrational number. (n is a positive integer greater than or equal to 2.)"

"Proof: Assuming 2 to the nth power is a rational number, count it as p/q, and p and q are prime numbers to each other."

"Then 2=(p^n)/(q^n), ie 2(q^n)=(p^n)"

"P^n = q^n + q^n for transposition."

"According to Fermat's last law: there is no positive integer solution to this equation. Therefore, the assumption is wrong, and 2 to the nth power is an irrational number."

Li Zhendong almost spit out old blood: "You can't teach my sister like this, you really can't! And you are helping her with the Mathematical Olympiad, how can this work?"

Zhang Yuan was stunned, and found that he seemed to have become a thug who did homework for free without knowing it.

But it doesn't matter, the whole idea of ​​the proof... If you copied it exactly, the teacher would definitely laugh like crazy.

"Forget it, I won't do it either. This is enough for entertainment." Zhang Yuan yawned, feeling quite happy.

Li Zhendong finally breathed a sigh of relief, he couldn't wait to put down the book in his hand, and rubbed his aching temple.

He picked up the binoculars, walked out of the balcony, and looked in a direction in the deep space.

Gliese 581, a red dwarf star about 2 degrees north of Beta Libra, their destination.

It has a mass of 0.31 solar masses, a radius of 0.38 solar radii, and a surface temperature of about 3,480K (3206.85°C).

The visual star of +10.56 means that ordinary astronomical telescopes cannot see there, but Li Zhendong is still searching tirelessly.

That is the mother star of the future!

Li Zhendong had a sudden thought: "You said, why is there a deep space plan? Could it be that the high-level human beings have already learned that aliens will come to attack the earth?"

"impossible!"

Zhang Yuan responded indifferently: "If this is really the case, it is definitely a large-scale construction of spaceships gathered from all over the world. And it is our turn to escape? You should have seen various science fiction movies, the end of the world is coming, Noah's Ark How much does the ticket cost? Even if we are the sons of scientists, it doesn't matter that much, does it?"

"Although the movie is not real, it is also a partial portrayal of the real. Now that no country leader is in a hurry to run away, when did human beings become so noble?"

There was silence for a while.

The 500,000 volunteers are not the best people in the earth's civilization, and everything depends on individual volunteers. There are a few scientific giants with dreams, but it is impossible for a real political giant to give up everything on earth and go to such a poor place.

Li Zhendong smiled: "Yes, so there are no aliens attacking the earth. Then what do you think is the reason?"

Zhang Yuan pointed to two directions of the sky, frowned and said: "It may be that, or it may be this... or there are two reasons, or there is a more important reason that we don't know..."

In the direction Zhang Yuan pointed at, there is a star, KIC-8462852, commonly known as Tabby's Star.

The one in the other direction is the η star in Carinae.

Look up to the sky.

The moon and stars are sparse, and the lights in the big cities cover the bright starry sky above. It becomes more difficult to find these stars.

In 1977 in history, there was a major blackout in North America.

On that night when the lights disappeared, the boundless sky revealed its original original appearance.

A ridiculous scene happened. That night, the police station actually received many calls to the police, saying that "aliens are attacking the earth!"

The reason is nothing more than... This group of urbanites has never seen the real Milky Way, and they are overwhelmed by the power of the ancient prehistoric.

Yes, Mother Earth is really too warm and gentle, so gentle that human beings in that era were reluctant to leave their infancy, and had gradually forgotten the vast world outside.

But……

This world is not only human beings.

The universe will not disappear directly because of human deception.

The first challenge comes from the "Eta Carinae Star", also known as Eta Carinae, a supergiant star with a mass more than 100 times that of the sun. Scientists estimate that this star may explode within a million years, forming a supernova!

Note that it is an extreme supernova, which has an extra word "extreme" than ordinary supernovae.

If it is good news that η Carinae is 7,500 light-years away from the solar system, then the other news is simply fatal...

After research, its rotation axis is likely to be aligned with the solar system, just like a star cannon ready to launch!

When the Eta Carinae star explodes, a powerful gamma-ray burst will sweep the entire solar system.

"Unfortunately, this bright star is not visible from the northern hemisphere."

Of course, this disaster may be very large or small. First of all, the timing of its outbreak is too vague. It may be a million years later, or it may be tomorrow, or even a hundred years ago.

What's more, scientists are still arguing about the deflection of the rotation axis of η Carinae and disaster prevention...

Human beings do not know much about this celestial body, and it is difficult to accurately predict the disasters it will bring to human civilization.

Gamma-ray bursts may destroy entire ecosystems after traveling long distances, or they may not have much impact. Anyway, I don't know.

The second challenge comes from KIC 8462852, Tabby Star.

In the 21st century, humans have discovered this strange star, and its periodic light changes have attracted widespread attention of astronomers.

At that time, many scientists speculated that the nebula or other large celestial bodies covered the star, which caused its light change.

But!

Hundreds of years of observations have only proved one thing: its shading is increasing at a rate of 0.64 per thousand per decade.

In other words, if the maximum shading data ten years ago was 22.112% shading, then it is 22.176% now, without exception.

What does that mean?

It means that there is an artificial building near that star, and it is being built at a constant speed.

Has been going on for hundreds of years!

Dyson sphere, there it is. There will be no change due to human will.

This fact caused great panic in the upper echelons of civilization.

The distance of 1400 light-years is too far away for human beings, but it is far from enough to smooth out this panic.

Any normal person knows what a "Dyson sphere" means.

Human civilization, compared with the civilization that can build Dyson spheres, is simply a paramecium!

At that time, Professor Qi Yuanshan, the "father of nuclear fusion", wrote excitedly in his diary: "If there are no more aliens, human beings will be destroyed by their own laziness!"

"... Just like the old days, the upcoming wave of entertainment, non-toxic neurological drugs is bound to destroy most of the human enterprising spirit. The Dyson ball is proved true, and mankind may be able to recover from the erosion of consumerism and capitalism, similar to The effect of the US-Soviet Cold War!"

"I have to say that human beings have a good neighbor, and maybe there is still hope. Fortunately, it's even...excellent!"