Homo sapiens.

But looking at the hatch with a height of only 1.52 meters in front of him, Zheng Lin could only use a mechanical leg knife to try to cut open the bulkhead and expand the size of the hatch, otherwise he would not be able to get in.

Although the hatch is made of aluminum alloy and composite materials, no matter how powerful the material is, it will still age in the face of a long time.

The mechanical leg knife was easily inserted into the bulkhead. He activated the chainsaw mode, and a burst of sparks burst out of the bulkhead.

Two 10 minutes later.

A hole two meters high and two meters wide was cut, and Zheng Lin entered the cabin.

The cabin is not spacious, and it looks a bit narrow for Zheng Lin who is manipulating the exoskeleton armor. There are rows of cabinets in one of the walls.

There is also a thermal reaction inside, which is a nuclear battery center, but only a small part of the plutonium 239 is left.

He first checked the condition of the nuclear battery system.

It was found that the power generation system of the nuclear battery had been completely scrapped, and the heat energy generated by the nuclear battery was also neutralized by the surrounding low temperature.

He tried to take out one of the nuclear batteries, and after a lot of effort, he successfully took out one of the nuclear batteries.

He re-examined the plutonium-239 content of the nuclear battery using the magnetic field detector that comes with the exoskeleton armor.

The data was fed back to the supercomputer of the Cicada-class spacecraft 004, and soon based on the decay situation and the content of other elements, they could basically confirm that this plutonium nuclear battery was manufactured 45300 to 45400 years ago.

Zheng Lin took out three nuclear batteries one after another, and found that the manufacturing time was about the same.

Of course, this is not 100% certain, because it cannot be ruled out that it was created by an alien civilization during the flight.

Therefore, he had to spot check the manufacturing time of nuclear batteries in several nuclear battery centers before he could determine the specific manufacturing time of this spaceship.

The search for alien spacecraft continues.

But on the other side of the earth, based on the information discovered during this exploration, relevant research topics have been launched.

Chapter 6 and Four Ghosts

Mikoyan was at the Cosmic Observation Office at this time.

The old man who spoke at the meeting before has obtained various data after the Cicada 004 boarded the alien spacecraft.

And legions of astronomers are studying the data.

Dr. Mikoyan asked: "Ivan, what do you think?"

While quickly analyzing the data, the old man replied casually: "45300~45400 years, basically we can lock the starting time of this spaceship, plus the other party's sailing direction."

He casually called up a star map and circled an area.

"The starting area of ​​the alien spacecraft is probably here."

Looking at the empty target area, Dr. Mikoyan stroked his beard thoughtfully: "Dark Star?"

"You should know that in the long evolutionary history of the universe, apart from a large number of planetary systems, there are actually not a few dark stars hidden in the seemingly empty interstellar space." Old Ivan explained calmly.

The so-called dark stars are wandering planets floating outside the planetary system.

These rogue worlds include asteroids, planets, and ultra-dark red dwarfs.

Asteroids and planets, in particular, are hard to detect with telescopes because they don't emit light.

Dark stars can also be called ghost planets.

Ivan speculates that the parent star of the alien spacecraft is most likely a dark star. As for whether it is an ultra-dark red dwarf star or a planet, it is still unknown.

"Mikoyan, I want to mobilize some cosmic astronomical telescopes to focus on observing this area and see if I can find this dark star."

Mikoyan thought for a while: "This kind of planet should be difficult to lock, right?"

"It's really hard, but I want to try."

Seeing the eyes of his old friend, Mikoyan knew that this guy had made up his mind, and he nodded: "Okay! I can give you a letter of assistance and let those astronomical telescopes cooperate with you."

"Thanks."

"You're welcome."

In fact, the Space Observatory Office has quite a few astronomical telescopes.

However, the astronomical telescopes owned by their office are all on the earth's ground and in low-Earth orbit.

In addition to the astronomical telescopes of the Space Observation Office, there are five other institutions within Homo sapiens that also have astronomical telescopes.

These 5 institutions are: Space Business Department - Cosmic Security Office, Science Business Department - Institute of Astrophysics, Industry Department - Xingkong Precision Instrument Group, Planetary Physics Equipment Group, Hengguang Precision Instrument Group.

Among them, the astronomical telescopes of the Cosmic Security Office are the largest, densely covered with gold, wood, water, fire, earth and the six planets of the earth, with a total of 729 cosmic astronomical telescopes.

The Institute of Astrophysics has a total of 76 astronomical telescopes and scientific detection equipment, which is almost the same number as the Space Observation Office.

Finally, there are Xingkong Precision Instruments, Planetary Physics Equipment, and Hengguang Precision Instruments. These three are equipment research and development and manufacturing companies. They have 20 to 50 equipment operating in outer space, mainly for testing equipment.

The first institution that Ivan contacted was the Institute of Astrophysics.

The two sides hit it off and quickly organized various types of astronomical telescopes to closely monitor the void.

And with the passage of time, the cicada-class 004 spacecraft collected more and more information on the alien spacecraft.

These intelligences have further determined the power of the alien spacecraft, which is beneficial to determine the speed limit of the alien spacecraft.

After determining the speed of the alien spacecraft and adding the departure time of the alien spacecraft, the approximate position of its starting point can be determined.

Finally, Ivan and others finally locked on an approximate location, which is at a distance of 3.021 to 3.025 light years.

The angle and space coordinates, together with the possible moving area of ​​the ghost planet, have also been analyzed by other researchers one after another.

According to this data, they gathered a large number of high-precision astronomical telescopes and detection equipment. After four months, they finally found the clues of this ghost planet.

This is a gaseous planet with a radius 1.6 times larger than Jupiter and a huge ring.

The discovery of this planet is also due to the huge star ring of this planet, which increases the reflection area of ​​starlight.

The planet is currently drifting in the other direction. According to the current speed of movement, it is expected to reach the vicinity of Vega in 8720 million years.

Apparently the planet is moving away from the solar system.

Although they don't know whether the civilization on this planet is still there, they still have some speculations after comprehensive information.

Resource depletion and internal war are the two most likely.

After all, this is just a large gaseous planet. Even if the gaseous planet abducts dozens of natural satellites, it is estimated that it is not enough for a civilization to develop to a level 1 civilization.

The alien civilization discovered that the parent star was drifting in the direction of the distant Vega, and it would take another 8720 million years before it could reach the vicinity of Vega.

This time is really hopeless.

Even Ivan and others feel sad for this civilization.

When the population of the mother planet continues to grow, unless their entire civilization can reasonably control the growth of the population, or adjust various technological developments, the resources will be exhausted sooner or later.

Ivan and others guessed that this civilization might have faced two choices at that time.

One is to endure hard, wait until after 8720 million, the parent star arrives near Vega, and then quickly immigrate to Vega.

Another option is to emigrate to the nearest planetary system - the solar system.

However, according to the reverse deduction of the technology of the alien spacecraft, the technological level of the alien civilization is not the same as that of the current human civilization, and even some of the technology is not as good as that of Homo sapiens.

With such a level of technology, it is difficult to imagine how difficult it is to build a generational spaceship and attempt to migrate to the solar system across a distance of 3 light years.

Moreover, the major think tank offices of Homo sapiens have simulated the social form of this alien civilization.

Combined with the currently known information, the alien civilization is most likely not monolithic, but some members are conservatives who tend to wait, and the other part is the radicals who tend to emigrate to the solar system.

This can be reversed and analyzed from the fact that the opponent only launches a spaceship of a generation.

If this civilization is really united, then they will emigrate to the solar system, there must be more than one generation spaceship, but they will gather all the resources of the parent star.

In this way, they can build at least several hundred generation spaceships.

If there are really hundreds of generation spaceships, then this alien spaceship will not completely perish now, large-scale flying generation spaceships, resources can be scrapped to ensure that part of the spaceships can be maintained.

It can be seen that in this alien civilization, immigrant radicals are very likely to be a minority, and most of the other aliens are conservatives.

According to this conclusion, another piece of information can be deduced, that is, on the parent planet of this civilization, there are very likely members who have survived.

This makes Homo sapiens companies have to be highly vigilant.

After all, the technology of this alien spacecraft was only manufactured by the civilization 4.52 years ago, and does not represent the current true technological level of the civilization.

If the other party has advanced by leaps and bounds in technology over the past tens of thousands of years, then this alien civilization will be a huge threat to human civilization.

After reading these analysis reports, Li Qingye immediately asked the various departments of the company to discuss and prepare a plan for dealing with the invasion of the solar system by alien civilizations.

And the other side.

Cicada-class spacecraft 004 has also entered a new stage in its exploration of alien spacecraft, and they are preparing to check the situation of aliens.

Chapter 6 and five

In the dark void.

The alien spaceship and Cicada-class 004 continued to advance rapidly towards the distant edge of the Kuiper belt in the same direction as before.

After several months of exploring the interior of the alien spacecraft, the exploration team has naturally figured out the situation inside, including the location of alien creatures.

Inside this alien spacecraft, there are many alien creatures discovered so far.

But in the previous exploration process, the exploration team avoided these alien creatures, and at the same time they were secretly testing to see if these alien creatures were really dead, or they were doing things in secret.

After several months of probing, the exploration team and the Homo sapiens company behind it have preliminarily determined that all these alien creatures have lost their lives.

Even if these creatures are frozen, Homo sapiens company is too clear about the cryonics technology. Li Qingye had studied the cryopreservation technology in depth in order to prolong his life.

There are three elements, or limitations, to this technique.

First, the cells of the frozen organisms must have anti-ice crystallization and anti-ice water deformation, otherwise the cells will die for you every minute during freezing and thawing.

Second, the freezing system must remain stable during the freezing of organisms, otherwise it is easy to cause failure to wake up, or even directly cause the body to die.

Third, the freezing period should not be too long. The current Homo sapiens technology can only be frozen for a maximum of 37 months. If this period is exceeded, the brain will experience severe memory loss.

And don't think that freezing beyond the limit will only cause memory problems. If it is frozen for more than a few decades, it may sleep forever.

According to the information currently analyzed from the alien spacecraft, the alien spacecraft departed from the parent star about 45270 years ago, and the last nuclear reactor was shut down 13760 years ago.

In other words, the creatures inside the alien spacecraft have been frozen for at least 13760 years.

Even if the alien civilization's bio-freezing technology is superior to Homo sapiens, there is no way to guarantee that the body can be thawed and revived after 13760 years of freezing.

Of course, Li Qingye knows that there is a solution that can indeed be frozen for a long time, and it can be safely revived after thawing, and the memory will not be lost.

That is "absolute zero cryonics technology".

This is also a new technology currently being researched by Homo sapiens, which is considered an essential technology for interstellar navigation.

Why can absolute zero human body cryogenic technology be maintained for a long time?

The reason lies in atomic motion.

Be aware that the closer the temperature is to absolute zero, the less atomic activity there will be.

The fundamental reason why ordinary freezing technology cannot be maintained for a long time is that in ordinary freezing, atoms still have obvious traces of activity.

It’s okay in a short period of time, but once the time exceeds three years, the accumulation of atomic activities will gradually damage the structure of cells and neurons.

After being frozen for more than several decades, the atomic activities of the body have not been corrected by the physiological activities of the body in time, the cells and gene sequences have long been riddled with atomic activities, and the organisms are bound to die.

In the past, there was a project of freezing human bodies on the earth for a while, and many people even participated in it.

Obviously, those who participated in the freezing had basically no possibility of survival.

As for the refrigeration system on the alien spacecraft, it is obvious that there is no way to achieve absolute zero, even if it was once able to achieve close to absolute zero, after the spacecraft's energy is completely exhausted, the refrigeration system naturally cannot maintain it.

After more than 1 years of disorderly freezing, those aliens were probably frozen to death.

That's why the exploration team got permission from the Space Division and began to prepare to extract those frozen alien creatures.

Zheng Lin, who had just been on vacation for half a month, was on duty again. He led the team into the alien spacecraft again. This time, the cicada-class 004 spacecraft activated three exploration craft and six synchronous robots.

Zheng Lin manipulated the exoskeleton with ease, and entered the passage of the alien spacecraft.

It took about half an hour to make seven turns and eight turns.

A group of people finally entered a huge cabin.

There are 500 cryopods on display here.