"Helium flash?" Xia Lin's first reaction when he heard this word was to look at the sun, but after a few seconds, he came back to his senses. If it was really a helium flash, then this planet should no longer exist. , In a few seconds, more than 100 million times more star energy will be released, and individual stars will even release instantaneous energy equivalent to the power of the entire Milky Way.

Helium flash is an inevitable phenomenon when a star goes from young to old. The reason is that the hydrogen in the core has been exhausted, but the generated helium relies on degeneracy pressure instead of thermal pressure to resist the gravity of the star, and cannot ignite helium fusion.

The degeneracy here refers to complete degeneracy. Simply put, a group of free particles is regarded as a series of discontinuous energies, which is called a quantum state, and based on the Pauli exclusion principle, the same fermions cannot occupy the same quantum states, and if every quantum state is fully occupied, the state at this time is "completely degenerate".

And when the particle is in complete degeneracy, reducing the volume or increasing the particle will force the particle to enter the energy-level quantum state, and at the macro level, a compression force is needed, which is expressed as resistance to pressure, and this force is called The degeneracy pressure or Fermi pressure is not zero even at absolute zero, and this pressure does not depend on the temperature, but on the density of fermions.

And when the temperature and degeneracy pressure of the star core increase to a certain level, the flame of helium fusion will be ignited. Since the volume of degenerate matter is not affected by temperature, the ultra-high density will make helium burn much faster than hydrogen. In just a few seconds, a huge amount of energy is released and the star ages.

And when the process ends, because a large amount of energy is absorbed by the outer shell, thermal pressure becomes dominant again, and finally a new balance is formed, and the matter will expand and cool as a result, and the star becomes a red giant star. At this time, the core is 40% of the mass Electron degenerate helium with 6% carbon.

In addition to this conventional helium flash, there is also a helium flash that occurs when a star enters the progressive giant branch, which is the so-called "shell helium flash". The release of this energy is relatively long and low, because the star The helium in the interior is also depleted, leaving only a thin layer of hydrogen on the surface and a helium flash formed by the helium below.

The fusion warheads of the Covenant's conventional anti-ship missiles are degenerate fusions constructed using gravitons, which will form degenerate ultra-high-density and high-temperature matter different from the plasma state, which will be released as a penetrating beam within a few seconds. the jet.

The incident diameter of the jet is less than 2 meters. After entering the target, it will expand and cool rapidly like a giant star. The high-temperature material above 20 million Kelvin quickly forms a ball and swallows the surrounding hull, with an instantaneous equivalent of more than [-] billion tons.

In order to ensure saturation and destruction, this anti-ship missile will launch 24 at a time, including true and false warheads, a total of 170 to 190 warheads, of which 48 are real warheads, and only one hit is enough to destroy a mega missile. All warships over 100 million tons were destroyed.

Xia Lin, who was born in the war years, not only knows what a helium flash is, but also has seen the anti-ship missile "artificial helium flash jet" that is countless times weaker than a natural star bombarding a planet or a spaceship. Scalp numbness.

This is not a question of how to live - because before the helium flash, the star shrinks, the luminosity weakens, and the ray enhancement is enough to blow up the entire ecological circle at a close distance, and the moment of the helium flash cannot be waited for.

However, it is true that the matter at hand cannot get away, and in the end it can only be connected remotely, and the doctor agreed after careful consideration. After all, once a helium flash occurs, everything will be wiped out. After eating, it will be gone in a few days. He still knows which is more important.

"The time of the helium flash, and what does the number you give mean?"

"You do not understand?"

"Nonsense, I'm an agronomy major!" The doctor was silent for a long time, with that expression, as if in the despair of closing the city, you finally found an underground channel to smuggle a fried chicken, and when you were about to bite it, you found It's like artificial meat.

"That's the luminosity observation function of the star. Let me get it straight. What do you think of the circle around Terra?"

"You mean the circle of rubble above?" Xia Lin thought for a few seconds, "Is that the wreckage of your construction?"

"No, it's the wreckage of the defensive barrier. No, it should be said to be part of the defensive barrier." When the doctor faced Xia Lin, who was also a high-level civilization, he didn't say any riddles, because both parties could understand the meaning inside.

"Terra has many relics and civilizations of many generations. They call me the ancestors, but in fact, we are not the first generation of civilization on Terra." The doctor considered the language, "A long time ago, Terra A star is a very... bright star, a very bright star means that its thermonuclear reaction is very violent, either its mass is large enough, or its combustion reaction speed is too fast..."

"Origin stone effect field, no, it should be said that it is caused by the substance of origin stone particles?"

"...That's right" the doctor replied after being silent for a while, "You must have discovered the characteristics of the origin stone, so the simplest reason is that the origin stone is activated by the electromagnetic source, so the largest electromagnetic source in the galaxy which one?"

"The sun, therefore, it will cycle through the cycle of its life to happen the same thing as the Terra disaster. The brightness and thermal pressure increase rapidly in a short period of time. The thermal pressure exceeds the star's gravity, and the star's material expands, eventually engulfing the nearest orbiting planet."

"The higher thermal pressure will allow helium to accumulate at a faster rate, and it does not need to reach the deposition to exceed the threshold before entering the degenerate state, further increasing the density and heat of the star's core, accelerating the reaction, and then... "

"Helium flash, a star that will start helium flash without getting old, our sun... will swallow its children earlier, in fact, it has already swallowed two planets. "The doctor broke out another shocking news.

"Compared to the natural disasters on the planet, the cycle of this kind of nova-like phenomenon on the sun is longer. The first time, it brought the fire of life to Terra, and the second time, it destroyed the first generation of civilization and drove the survivors away. Go underground, Durins, you may have seen it, their technology is very advanced."

"So how many times is it now?"

"The fourth and last time is the real helium flash. The hydrogen is consumed too fast, and its brightness is dropping rapidly. Do you know why Terra is full of deserts? Because the original sun was twice as bright as it is now .”

"Iberia used to be a desert, and Ursus and Dayan were warm and comfortable fertile lands because they were close to the poles. Our civilization prospered in this area. If you are lucky enough to break through those... You know the monster, go into the North Pole, and you'll see our former metropolis and aerospace engineering center."

"And now, Iberia can be inhabited, you should know what that means, right?"

"The brightness decays too fast, so a helium flash is about to happen. By the way, you just said it was the fourth time, so what about the third time?"

"The third time, we blocked it." The doctor said indifferently, "Using the source stone and the moon, we captured a wandering asteroid and turned it into Terra's second moon. A part of the moon was shattered, and the resulting dust and rocks of the origin stone absorbed the energy released by the star and survived."

"So, you say it's the remains of a defensive barrier?"

"Yes, this star will eventually engulf our world, and the only way is to leave it before the fourth nova, which is the real helium flash. The entire galaxy is moving away from the star cluster. We not only need to outperform the helium flash, It still needs to outrun the speed of the galaxy's movement." The doctor gestured with an explosion, "Then? Then an unimaginable flare, bang~ all hope, it's gone."

"Starship No. 45 is accelerating around the star, and [-] people are turned into ashes in an instant. Starship No. [-] was launched in a hurry, and no one knows where it went. No. [-], the largest No. [-], was halfway repaired. Everyone in orbit was wiped out by the flare."

"Not only that, the flare caused the height of the origin stone defense zone, which should have been quite a distance from Terra, to drop, and some of the origin stone entered the atmosphere environment. In the end, you saw frequent natural disasters."

"The defensive belt fell and blocked the sun, and the dust and low-temperature thick clouds turned into a torrential rain. A torrential rain that lasted for 300 years turned the polar urban agglomeration into a glacier, turned Ursus into a snowfield, and turned the desert into an ocean. It also turned the wind-eroded desert where birds don’t shit into the fertile Casimir Plain”

The doctor's tone was full of jokes. After all, the only person on this planet who could fully understand what he was talking about, and who could understand and imagine the scene, was the forced landing of a higher civilization in front of him.

"By the way, these stones also turned our magnificent Jerusalem project, an orbital ring around a star linked by space elevators at the poles, into a heap of crap, with leaked maintainer clusters at the poles forming a very...  .Weird stuff, and the bred species we were supposed to use to renovate our new home fell into the ocean with the orbital ring debris."

"How about it? After listening to Terra's past epics, what do you think?" The doctor asked, "Do you feel magnificent and extraordinary, or do you think it is extremely ridiculous, just like a group of ants facing the despair of a faucet?"

"Not at all." Old Xia scratched his head, "My idea is that it might be very interesting to start a space waste recycling company here, if your polar city hasn't been destroyed by scrap iron."

"You have nothing to fear?"

"Yes, but it's useless to be afraid." Lao Xia said honestly, "Actually, many aliens say that we are creatures that don't know fear. In fact, it's not that we don't know fear, but that fear doesn't work , I think, you are the same, right?"

"Hmm..." The doctor is called a cold-blooded and ruthless evil spirit. He doesn't know what fear is, but, as Lao Xia said, he has seen such a truly terrifying person, and he has faced The insignificant power of the universe and the living beings, everything on the surface of this planet has nothing to fear.

"Come back to business, I want your jump engine." The doctor got to the point, "This is our only hope. My original plan was to assist Theresa to unify Sarkaz. She is also the one who knows the truth of all this."

The Doctor recalled that the queen at that time was almost so scared that she couldn't sleep for a week. She just read the doctor's memory out of curiosity, and then... For a nomadic queen living in the post-waste era, No stronger than a three-year-old girl in the face of the sun's fury.

"Unify Sarkaz, use the power of the Sarkaz Demon King to unify the entire Terra, gather the power of the entire Terra, take back the North Pole Space City, and then use all available resources and all relics to complete the construction of Starship No. [-] , run away, but now I have a better plan."

"Part of the failure of the starship is the problem of solar flares, and part of it is that our engine technology is not enough to propel such a huge ark away. However, you have a jump engine. I asked, the fastest is 4 times the speed of light, right?"

"If you took that huge thing with you, it probably wouldn't be able to fly at all."

"It doesn't matter, that means we can send people to the planets farthest from the sun first, and use Terra and other planets as shields to resist helium flashes." The doctor began to explain his new plan enthusiastically.

"4 times the speed of light means that it takes about 4 hours to go back and forth from Terra to the farthest planet. As long as your engine can support our large immigration transfer ship at that time, I remember there are two more in the North Pole. We can use 300 million per day. Transfer people and supplies to a safe planet at human speed."

"Ahem, let me interrupt. If there is such a ship and it is suitable for Star Alliance technology, why don't I drive this thing and go home directly?" Lao Xia complained.

"What do you think?" The doctor looked at him, "The universe is vast, and 4 times the speed of light is only slightly faster than a snail crawling. If your hometown is not nearby, I think...you will not be able to do it before you die of old age." Too likely to go home."

"..." Both of them were silent for a long time.

"Your plan needs to change, and I will not give you the jump engine, this is our top secret, so, I must master the ship you said, but, I promise to help you send your people to safety area, and, I suppose that planet wouldn't be a perfect place for a Terran to live?"

"No, so?"

"Alien colonization, establishment of an ecological circle and life support system, I am a professional." Lao Xia is very proud of this, which is indeed within the professional scope.

"So, the first half of your plan will not change. Galaxy colonization is not as simple as you think. We need a lot of food, fuel, population, professional technical workers, and there is a prerequisite for organizing evacuation. You must have organizational skills , unless you are prepared to abandon more than 95% of Terra's people."

"You're right" the doctor also realized that he was too happy too soon.

"So, you see, we are doing the same thing now, destroying those backward nobles, integrating Terra's productivity and organizational power, and integrating your remaining technologies. Believe me, this is not useless work. Whether it's sailing, it's not a plug-and-play household appliance." Lao Xia also roughly has a detailed work plan.

"By the way, how long is your predicted helium flash?"

"350 years, at most, if you are unlucky, it will start in about 200 years"

"..."

"..."

Lao Xia tentatively asked, "Do you know what our limit lifespan is?"

"Ok?"

"200 years old, 220~230 years old to be precise, and I am already 35 years old, which means that I am old and dead, and this helium flash will not hit me."

"Since that's the case... You shouldn't hold on to the leap technology, anyway, you won't be able to use it when you're old and dead."

"No, what I mean is, since I will never encounter such a tragedy from birth to death, why should I betray my ethnic group and give this technology to you?" Lao Xia shook his head, leap is the highest technology of the Star Alliance Confidential, if he is not still alive, activating the self-destruct device is what he should do.

The Terrans are also humans or human subspecies, without reproductive isolation, and belong to a naturalized nation according to the standards of the Star Alliance. In other words, in theory, if the Star Alliance finds Terra, the locals can basically get it. ID card, but after all, they haven't got it yet.

Even if you get it, as long as you are not a member of the council, but just a vassal, the jump technology will not be open to them, and the intensity of wars between humans is no less than wars with foreign races. After Star Wars , The Star Alliance also fought a colonial unification war for almost 15 years, taking back those disintegrated colonies.

[Of course, nearly a century after the war, the first-generation jump technology was gradually opened to these human colony members and hardcore vassals that have passed the test of time. 】

"However, you will also have descendants. I remember that you are engaged to a lady from the Shi Huaiya family. Don't you think about future generations?"

"If I can't create an aircraft that can carry a jump engine to launch my wife, children, and children within 200 years, you will underestimate me, the main force of the retro rocket club."

"Is that enough? Humans are social animals, and a society is what they need."

"The premise is that they are not hanged. You have nothing to persuade in this regard. Human nature..." Lao Xia shook his head.

"The first generation is a hero, the second generation is a guardian dog, and the third generation is a tyrant, because he holds the important weapon of civilization. Once the control is exchanged, in order to eradicate future troubles, do I still need to say the result? You can Guarantee that the people of Terra will not do such a thing, or can you guarantee that your descendant and mine will not become a tyrant?"

"Compared to being hanged by the people, I tend to let them live in the hibernation cabin, maybe there is a chance to be found by the rescue team of the Star Alliance."

"Wait a minute, you just said the rescue team?" The doctor suddenly caught a word, "Can your galaxy projection ability reach here?"

"If there is a super-membrane beacon, my answer is: yes." Xia Lin nodded.

"What will your people do to the people of Terra, will they save us? Or will it be a time of destruction and conquest?"

"Neither, you will be absorbed, if the first stage of your plan is perfect, the process will not kill a few people, if not... your nobles, historians, bureaucrats, capitalists, Intellectuals, as many as there are, will die.”

"You can't tolerate dissidents?"

"It's because you can't tolerate dissidents." Lao Xia shrugged. The Star Alliance doesn't mind absorbing a bit of human culture that has developed in a strange shape. A production organization structure and an advanced social system is a technical issue.

You know, what the Star Alliance hates the most is not waste, but being a waste but insisting on proving that they are capable, creating a bunch of troublesome "big smarts".

"..." The doctor didn't know how many times he fell silent. He was right. It may be the upper echelons of Terra who can't tolerate aliens. They can't even tolerate infected people, let alone a group of aliens. , and once a conflict breaks out - the ancestors of the past may still have the capital to negotiate, but the current Terrans...

"So what does it take to fix that beacon you're talking about?"

"I don't know, I don't know how to repair it, and the guy on the moon probably doesn't know how to repair it either. Even if it is repaired, do you have the materials?"

"Maybe... yes."

"Ok?"

"If the core of some black technology is not damaged, there may be some in the space city in the polar region"

"If I have to say it, the core is indeed not damaged, or completely damaged, but the other components are..." broken into slag.

"And there are sufficiently advanced manufacturing and production equipment there. Although our technology is not as good as yours, but... wait, what do you think of our technology level?"

"Do you want to hear the truth or be obedient?"

"...You don't need to say it, anyway, this is also a hope, isn't it?"

"Yes, but, the final conclusion is—whether it is your Tomorrow's Ark plan or my Shouting plan, there is a prerequisite..." The two did not talk about the next topic, because it was completely irrelevant. Answers to questions.

The premise is that the entire Terra is twisted into a country.

Whether it is organizing evacuation or attacking the North Pole, manufacturing auxiliary components of communication equipment requires this prerequisite, and it is necessary to plan to spend half of your life.

【PS】

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