Chapter 123: Warmth

Death at low temperatures depends on the person's constitution and the kind of medium to which they are exposed. If exposed to air, a person can stay in the air for a short time from a few tens of degrees below zero to more than a hundred degrees below zero (if there is wind, this temperature threshold should be significantly increased, for example, in the case of -50 degrees, a wind of 10 m/s blows, the speed of heat removal may be equivalent to the speed of still air of -100 degrees) Antarctic expedition team members can actually have body parts exposed to air for a short time.

However, supercooled air, although the person will not hang up, the nasal trachea and lungs may be frostbitten. Water is completely different, not because it conducts heat well, but because it is much denser than air. Immersed in water at 0 degrees, untrained people can lose consciousness in an instant; Or finish it in less than 5 minutes. But a trained person can stay in water at 0 degrees for dozens of minutes. (Winter swimming events, etc.)

However, in any case, it is not possible to stay in 0 degree water for hours. If the water temperature is increased by 10 degrees, people can stay in the water for 1 hour or more, but they will not tolerate more than half a day. 20 degrees of water can be more than a day (rescue records have been recorded).Other media such as dry ice (-77 degrees) or liquid nitrogen (-196 degrees) in experiments are much more dangerous, but generally not in the conditions of total immersion. Touching the skin can cause severe frostbite in an instant, because the instantaneous evaporation causes the skin and subcutaneous tissues to freeze in one fell swoop.

Therefore, this way of slow death is definitely torture for Du Jin, not to mention that he really experienced the despair before death before passing out, and now he experiences it again, which is really unfair to Du Jin, with the gradual reduction of expectations in Du Jin's heart, as well as the numbness of the physical senses, Du Jin's heart seems to have accepted his fate, and he does not have anger and hatred for the whole world in his heart, but the helplessness of not destroying the blood mark for himself, because he knows that if there is no one like himself in a short period of time" The Chosen One" appeared, coupled with Bluestar's continued research on those few blood mark fragments.

I'm afraid that there is no need to curb the spread of corpse mutants in the blood seal world at that time, the human beings in the current world will spread out the root of all evil as if they were self-inflicted, and the situation of the blue star in the current world is much worse, the interstellar federal government has at least entered the era of interstellar colonization, unless the infection caused by the blood seal breaks out at the same time in all the colonies and colonized planets within its borders, otherwise the continuation of human beings will not be completely cut off, and there will be a chance to defeat the corpse mutant and blood mark and return home.

But this world is different, infection will destroy everything for human beings, at that time there is absolutely nowhere to escape for humans on the blue star, and now the real pioneering step is only to grow a limited number of crops in the soil sampled from the moon, as for how to resist the temperature difference on the moon, radiation and impact, the technical progress in these aspects can only be said to be unsatisfactory, and then it is really necessary to colonize, first of all, we must use helium-3 to master controlled nuclear fusion, establish a large mass accelerator near the equator, and project building materials to the lunar orbit, A large space station and spaceport would be built in lunar orbit, and then a steelmaking plant would be built on the lunar surface with a large number of human resources permanently stationed on the lunar space station, and then a basic permanent fortress could be built on the lunar surface with the help of steelworks and industrial equipment projected from the earth.

Moreover, the moon is not the best place for human colonization abroad, and the main conditions for space colonization include:

1. The ease of traveling to the celestial body and returning to Earth

2. Ease of access to resources and energy

3. How easy it is to survive in this place

4. Economic benefits

This involves the increase in velocity required from the blue star to the various celestial bodies, which takes 9500 m/s to LEO and must be launched by a chemical rocket with a high thrust-to-weight ratio. The GEO requires 9500+4000m/s, the first half must be launched by a chemical rocket, and the second half can be used by a chemical rocket to take the Hohmann transfer orbit, or an electric thrust spiral to ascend the orbit, or a chemical electric propulsion hybrid lift. The speed increment required to reach the Blue Moon L4/5 Lagrange point is similar to that of GEO, and the second half is also a chemical rocket and electric propulsion. It takes three steps to the lunar surface, the first stage is the same to LEO, the middle stage is to enter the blue moon transfer orbit and brake to the circumlunar orbit, this step requires a speed increment of about 4000m/s, and the last stage is to land on the lunar surface from the circumlunar orbit, which must use chemical rockets, and the speed increases by 1830m/s, totaling about 15330m/s.

It is easier to go to Mars than to the lunar surface, directly from the transfer orbit using pneumatic deceleration braking or simply plunging into the atmosphere, and the speed increment only needs about 14,000 m/s. As for going to the near-Earth asteroid, 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, it needs to be accelerated with a large speed increment and then decelerated and braked. For the main belt asteroid, 9500+9500m/s velocity increment is required, and the second half can rely on electric thrust.

Next, the colonization conditions of each celestial body are analyzed. For the Blue Moon Circle, it is characterized by the fact that it is easy and fast to travel from Earth and return to Earth, taking only three days at most. The Blue Moon Circle can be subdivided into LEO, GEO, L4/5 and the lunar surface, with the first three sites having no local resources to rely on external sources. LEO mainly obtains semi-finished products from Blue Star, which are processed in space for the final step and returned to Earth. With a short production process and few related equipment, it is suitable for providing space industrial products for Bluestar, but it is not suitable for colonization.

GEO is difficult to obtain resources from the blue star, nor can it be resupplied from the moon or asteroids, and it is only suitable for building solar power plants to deliver microwave or laser energy to the blue star. For L4/5, it is most suitable to obtain resources through the lunar electromagnetic projector, and the unguided and unmaneuverable load compartment can be directly launched, and the L4/5 space station can be decelerated and recovered by rope nets and other methods, compared to the load module launched to the lunar orbit also needs an orbital rounding rocket to lift the perigee, as for the delivery of the product to the blue star, it only needs 1000m/s speed increment from L4/5, although it is more than LEO, but it is far less than GEO. If the Earth's population is to be forcibly expelled into space, it is still a good choice to build a SIDE station here.

As for the lunar surface, the cost of going to the moon is very high, the speed increment required is more than that of going to Mars, and the lack of volatile costs such as H, C, and N on the moon makes it difficult to replenish the life maintenance support system, and is only suitable for mining areas and primary processing plants, not for colonization.

Mars colonization for the current human beings, really only stay in the theory and assumption stage, after all, the moon has a part of the practice of establishing an active test site, thinking of the dark future of human beings in the present world, Du Jin can't help but have a kind of sadness in his heart, is the helplessness of the jungle in the universe, the current stage of human beings for other civilizations that have already "soared", is really too weak, not to mention the face of the blood seal, a weapon of destruction made by a high-dimensional civilization, he can be sure, in the time span of the universe, The Blood Mark has definitely destroyed more than one civilization, as its genetic modification and cellular recombination capabilities are a nightmare for biological civilizations.

Just when Du Jin didn't want to think about everything that was going to happen next and wanted to close his eyes, he suddenly felt a hot current in his hand, and it was accompanied by a strange squirming sensation, as if something was crawling on him, his originally somewhat numb consciousness was instantly "awakened", Du Jin suddenly recalled that the last time he came here, there seemed to be a mass of flesh and blood separated from the Blood Moon Planet attached to his hand:

"It seems to have life, it sticks to the back of Du Jin's hand and never goes down, and a strange "illusion" appears in his heart, Du Jin seems to feel that this mass of flesh is "drilling" into his body through the back of his hand, because the cold wet attachment that just existed only on the surface of the body has become a feeling of weakness and coldness in his entire arm, and a sense of rejection appeared in his whole body."

The feeling at that time Du Jin instantly recalled, but then he found that his body didn't seem to have the same reaction as before, as if he "recognized" the existence of the unknown flesh and blood, which really made Du Jin think about it very scary:

"Have I been assimilated?"

After Du Jin had just had this thought in his heart, his hand seemed to be responding to his question, and the heat flow spread to Du Jin's arm and even his whole body at a slow but rhythmic speed, and after a few seconds, Du Jin's vision was covered by a kind of flesh membrane, as for why Du Jin could guess that it was a meat membrane........... Judging from its bloodshot membranous body and yellowish texture, he could tell what it was when he had watched some medical students dissect certain animals.

And before Du Jin was afraid, he suddenly found that the numbness, pain and convulsions on his body due to the long-term low temperature were gone, and an abnormal warmth could make Du Jin imagine the feeling of his mother's arms instead of the cold, I have to say, but with this, Du Jin relaxed his vigilance a little in his heart against this layer of flesh that had covered his whole body, after all, if that mass of flesh and blood wanted to kill himself like the blood mark on the "Eden", he didn't need this way of warming himself to relieve the pain, with the blood mark in his understanding, either watching Du Jin slowly die in the pain caused by this low temperature, or quickly cutting through the mess and destroying Du Jin's brain or heart in an instant, so that he completely loses the possibility of threatening and counterattacking.

But judging by the results so far, this is not the case.