Chapter 123 Warmth
Death in low temperatures depends on the person's constitution and the medium to which they are exposed. If exposed to the air, a person can stay in the air at temperatures ranging from tens of degrees below zero to more than 100 degrees below zero for a short period of time (if there is wind, Then this temperature threshold needs to be significantly increased. For example, at -50 degrees, if the wind blows at 10 meters/second, the speed of heat removal may be equivalent to that of still air at -100 degrees.) The Antarctic scientific expedition team members actually Parts of the body can be exposed to the air for a short period of time.
However, although people will not die from supercooled air, the nose, trachea and lungs may be frostbitten. Water is completely different. It is not that water has good thermal conductivity, but that its density is much greater than that of air. The whole body is immersed in In water at 0 degrees, an untrained person can lose consciousness in an instant or within 5 minutes. But a trained person can stay in water at 0 degrees for dozens of minutes (winter swimming activities, etc.)
However, no matter what, one cannot stay in water at 0 degrees for several hours. If the water temperature increases by 10 degrees, people can stay in the water for 1 hour or more, but will not tolerate more than half a day. 20 degrees The water can last for more than a day (there are rescue records). Other media such as dry ice (-77 degrees) or liquid nitrogen (-196 degrees) in the experiment are much more dangerous, but generally there are no conditions where people can be fully immersed. If something comes into contact with the skin, it will cause severe frostbite in an instant, because the instantaneous evaporation will freeze the skin and subcutaneous tissue instantly.
Therefore, this kind of chronic death is absolutely torture for Du Jin, not to mention that he truly experienced the despair before death before passing out. It is really unfair to Du Jin to experience it again now. With the expectations in his heart gradually decreasing, and the numbness of his body's senses, Du Jin seemed to have accepted his fate in his heart. He did not feel anger and hatred towards the whole world, but was helpless that he had not destroyed the blood seal, because he knew that, If no "chosen one" like him appears in a short period of time, and Blue Star continues to study the blood seal fragments in depth.
I'm afraid that by then there will be no need to suppress the spread of necromorphs in the Blood Seal World. Human beings in this world will spread the roots of all evil as if they are committing suicide. Moreover, the situation of Blue Star in this world is much worse. At least the interstellar federal government Entering the era of interstellar colonization, unless the infection caused by the Blood Seal breaks out simultaneously in all colonies and colonial planets within its territory, the continuation of humankind will not be completely cut off. There is still a chance of defeating the Necromorphs and the Blood Seal and returning home. Chance.
But this world is different. Infection will destroy everything in human beings. At that time, humans on the Blue Star had absolutely nowhere to escape. Now the truly pioneering step is to grow limited crops in soil sampled from the moon. As for how to withstand temperature differences, radiation and impacts on the moon, the technical progress in these areas can only be said to be unsatisfactory. If we really want to colonize the moon, we must first use helium-3 to master controllable nuclear fusion, build a large mass accelerator near the equator, and project Building materials are sent to the lunar orbit, a large space station and a spaceport are built in the lunar orbit, and then a steelmaking plant is built on the lunar surface relying on a large number of human resources stationed on the lunar space station for a long time. Then the steelmaking plant and industrial equipment projected from the earth can be built on the lunar surface. Build a basic permanent fortress.
Moreover, the moon is not the best choice for human colonization. For space colonization, the main conditions to consider include:
1. How easy it is to travel to the celestial body and return to Earth
2. Difficulty in obtaining resources and energy
3. How difficult it is to survive here
4. Economic benefits
This involves the speed increment required from Blue Star to each celestial body. It requires 9500m/s to reach LEO, which must be launched through a chemical rocket with a high thrust-to-weight ratio. It takes 9500+4000m/s to get to GEO. The first half must also be launched by chemical rockets, while the second half can use chemical rockets to take the Hohmann transfer orbit, or use electric propeller spiral orbits, or chemical and electric propeller hybrid lifts. The speed increment required to reach the Blue Moon L4/5 Lagrange point is similar to that to GEO. The second half can also be done with chemical rockets or electric propulsion. It takes three steps to reach the lunar surface. The first step is to reach LEO, the middle step is to enter the blue moon transfer orbit and brake to the lunar orbit. This step requires a speed increase of about 4000m/s, and the last step is to land from the lunar orbit. On the lunar surface, chemical rockets must be used, and the speed increases by 1830m/s, totaling about 15330m/s.
Going to Mars is easier than going to the moon. You can directly use aerodynamic deceleration and braking from the transfer orbit or simply plunge into the atmosphere. The speed increase only requires about 14,000m/s. As for going to near-Earth asteroids, it is mainly limited by the relative position. If the launch window is suitable, then 9500+3500m/s is enough, which is less than going to GEO. But if it is not suitable, you need to use a large speed increment to accelerate closer and then slow down. Braked. For main belt asteroids, a speed increment of 9500+9500m/s is required, and the second half can be achieved by electric push.
Next, we analyze the colonization conditions of each celestial body one by one. For the colonization of the Blue Moon Circle, the characteristic of this place is that it is easy and fast to travel from and back to the Earth, taking only three days at most. The Blue Moon Circle can be subdivided into LEO, GEO, L4/5 and four parts of the moon. The first three places have no local resources and need to be provided externally. LEO mainly obtains semi-finished products from Blue Star, performs the final step of space processing and then returns them to Earth. The production process is short and there is little related equipment. It is very suitable for providing space industrial products to Blue Star, but it is not suitable for colonization.
GEO is difficult to obtain resources from Blue Star, and it is also difficult to replenish resources from the moon or asteroids. It is only suitable for building solar power stations and transmitting microwave or laser energy to Blue Star. For L4/5, it is most suitable to obtain resources through the lunar surface electromagnetic projector. It can directly launch the unguided and non-motorized payload module, and the L4/5 space station can slow down and recover it through rope nets and other methods. In contrast, launching to The payload module of the lunar orbit also requires an orbital circularization rocket to raise the perigee. As for delivering the product to Blue Star, it only requires a speed increase of 1000m/s from L4/5. Although it is more than LEO, it is far less than GEO. If the earth's population is to be forcibly expelled into space, building a SIDE station here is still a good choice.
As for the lunar surface, the cost of going to it is very high, and the speed increase required is greater than that of going to Mars. Moreover, the moon lacks volatile costs such as H, C, and N, making it difficult to replenish the life maintenance support system. It is only suitable for mining areas and primary processing plants. Not suitable for colonization.
For today's humans, the colonization of Mars is really only in the theoretical and imaginative stage. After all, there is some practice of establishing a mobile test site on the moon. Thinking of the dark future of human beings in this world, Du Jin couldn't help but feel a kind of sadness in his heart. It is the helplessness of the jungle in the universe. Human beings at this stage are really too weak to other civilizations that have already "ascended". What's more, facing the blood mark, a weapon of destruction created by high-dimensional civilization, he can be sure that in the future, In the time span of the universe, Blood Seal has definitely destroyed more than one civilization, because its ability to genetically modify and recombine cells can be called a nightmare for biological civilization.
Just when Du Jin didn't want to think about everything that was going to happen next to human beings and wanted to close his eyes, he suddenly felt a heat flow on his hand, accompanied by a strange crawling feeling, as if there was something on him. As if crawling, his numb consciousness was instantly "awakened". Du Jin suddenly recalled that the last time he came here, there seemed to be a ball of flesh and blood separated from the Blood Moon planet attached to his hand:
"It seemed to be alive. It stuck to the back of Du Jin's hand and refused to go away. And there was a strange "illusion" in his heart. Du Jin seemed to feel that this mass of flesh was moving into his body through the back of his hand. "Drill", because the cold moist adhesion that just existed on the body surface has turned into a feeling of weakness and coldness in his entire arm, and he has a feeling of rejection all over his body."
Du Jin instantly recalled the feeling at that time, but then he discovered that his body did not seem to have the same reaction as before, and seemed to "identify" with the existence of the unknown mass of flesh and blood. This really made Du Jin think deeply. fear:
"Am I already assimilated?"
Just after Du Jin had this thought in his mind, his hand seemed to be responding to his question. The heat spread to Du Jin's arms and even his whole body at a slow but rhythmic speed. After a few seconds, Du Jin's The field of vision was covered by a fleshy membrane. As for why Du Jin could guess that it was a fleshy membrane... From its bloodshot membrane and light yellow texture, he had observed it before He, who is a medical student who dissects certain animals, can naturally tell what they are.
Before Du Jin could get scared, he suddenly found that the numbness, pain and convulsions in his body caused by the long-term low temperature had disappeared. An unusual warmth made Du Jin imagine the feeling of his mother's arms instead of the severe cold. He had to Said, but based on this, Du Jin relaxed a little vigilance about the layer of fleshy membrane that had covered his whole body. After all, if that mass of flesh and blood wanted to kill him like the blood mark on the "Eden", it would not be possible at all. He didn't need this way of warming himself to relieve pain. Based on the blood mark he understood, either he would watch Du Jin slowly die in the pain caused by this low temperature, or he would cut through the mess with a quick knife and destroy Du Jin's body in an instant. Brain or heart, completely losing the possibility of threatening and counterattacking.
But judging from the current results, this is not the case.
