Hearing Yang Meng ask about the status of the spaceship, Xiao Yi immediately answered:

"Testing, analysis!"

"At present, the material that can enter the circulatory system in the spacecraft can already meet the needs of the circulatory system for a hundred years!"

"And the reserves of several elements in the slow-depleting material are insufficient, which cannot meet the requirements of long-term voyages!"

"Slow-depleting substances? Which kinds! ”

"Among them, the most consumed titanium, niobium for niobium-based superconductivity technology, and magnesium for light metal alloys, are still lacking.

In addition to these three elements, there are also elements that need to be spared in case of unexpected situations on the way back.

Looking at the long list of elements listed by Xiaoguang,

Yang Meng fell into contemplation, there are many ways to classify substances, and the standards for various classification methods are also very strict.

But in the eyes of their astronauts,

Matter on a spaceship is generally divided into two categories,

One is recyclable substances,

One is non-recyclable substances,

As long as the ship's circulatory system is functioning properly,

With the current recycling technology of human beings,

He doesn't need to worry about the loss of recyclable materials for a long time,

Just like oxygen, which is extremely important for humans,

As early as the space station era a hundred years ago, human beings no longer needed to transport oxygen from the earth to the space station with the carbon and oxygen catalytic cycle system.

As long as the circulatory system is maintained regularly, the exhaust gas exhaled by humans is recirculated into oxygen that can be inhaled.

And with the advancement of technology,

In 2021, we realized the technology of synthesizing carbon monoxide into proteins and carbon dioxide into starches from monosaccharides to polysaccharides.

Although the cost of this synthesis method is high because it requires a lot of electricity,

But with the breakthrough of controlled nuclear fusion, this limitation is not a problem,

Therefore, on the spaceship of this era, with the blessing of the circulatory system, human beings do not need to worry about the fundamental need of life such as eating and drinking.

As long as the circulatory system is working, humans can survive.

However, there are some substances that cannot be recycled,

Like many catalysts in the circulatory system, they will slowly wear out over time.

These depleted substances will slowly diffuse throughout the circulatory system at the particle level.

Therefore, the catalytic substances need to be cleaned and replaced in a timely manner

Thankfully, the demand for these catalytic substances is not much, as long as you prepare some spare materials, it is not a problem to support a hundred years.

The real trouble is the loss of materials on the outside of the spacecraft.

Thinking of the loss on the outside of the spaceship, Yang Meng secretly frowned:

"The metal on the outside of the spaceship is mainly titanium, but there are not many titanium elements on that piece of metal,

I don't know if there are any other metals that can replace titanium! ”

"What instead of titanium?"

At this time, Xiaoguang, who had just experienced a round of strange screams, heard Yang Meng's muttering, and an inquiry came.

Hearing such an inquiry, Yang Meng glanced at Xiaoguang in the video and responded:

"It's to deal with friction in the universe!"

"Friction?"

"Isn't there a vacuum in the universe? Where does friction come from? ”

Seeing the existence of Xiaoguang and also thinking that the universe is a vacuum environment, Yang Meng couldn't help but ask:

"Do you also think that the universe is really a vacuum?"

Hearing such a question, Xiaoguang flashed twice and responded:

"According to my observations during this time, it is not a vacuum environment, the universe is full of all kinds of high-energy rays, high-energy particle streams, but these things seem to have no effect on macroscopic objects?"

"You're ignoring speed."

"Speed!" Hearing Yang Meng's reminder, the small light flickered a few times and fell silent,

After all, Xiaoguang is a civilization that has existed for countless years,

Although their scientific and technological development is somewhat deformed, there are still some basic theories.

Seeing that Xiaoguang seemed to understand something, Yang Meng sighed silently,

In fact, the situation in the universe is far more complex than human imagination.

After all, the full name of the universe observed by humans is "visible universe"

The visible universe, on the other hand, includes visible light, gravitational perturbations, Roentgen rays, all bands of the spectrum, and so on.

It seems that the scope of human observation is extremely wide

But in fact, those areas that do not emit light, do not emit any energy, and have weak gravitational disturbances occupy most of the observable universe for humans.

Among them, the mere absence of light has affected human astronomical observations.

It's also because of such obstacles,

The first planet outside the solar system was only identified in 1995, and it was discovered through gravitational perturbations.

Prior to this, mankind once suspected that there were no planets other than the stars in the solar system......

It is also because of such a breakthrough,

No one can say for sure,

In the solar system and Proxima Centauri, the nearest star, there is nothing in the 4.3 light-year interval.

And after removing the gravitational perturbation range of each of the two stars of one light-year,

There are also dark and cold regions with no light, microgravity, and no energy for nearly two light years.

Nothing can be seen in this with the astronomical observation technology of human beings at that time.

It is precisely because of this situation that

Pioneer astronauts have also encountered many crises when they left the solar system and walked in the dark.

And most of these crises come from the impact of tiny floating objects in the universe, which wear away the external structure of the spacecraft.

"But how fast do you need to make a high-energy particle cause damage to a spaceship?"

At this time, Xiaoguang seemed to have calculated the correctness of Yang Meng's words just now, and threw out such a question,

Yang Meng was not surprised that Xiaoguang asked such a question,

As a civilization that has been trapped on one planet,

It's hard for them to imagine how fast they need to be in the universe to make basic interstellar travel.

It's like a human running on the ground,

It's hard to imagine that early supersonic aircraft, after breaking through the sound barrier,

Because the aerodynamic model is not well designed, it is torn to pieces by the air.

It is even more unimaginable that when the space station's return capsule re-enters the atmosphere, it will produce a high temperature of thousands of degrees under high-speed friction with the air that humans are accustomed to.

And in the universe,

At first, humans didn't care about the tiny dust particles.

After all, most of the detectors at that time had a speed of between 20 and 50 kilometers per second.

The fastest is to reach hundreds of times the speed of sound!

But between interstellar travel, the lowest speed also requires one hundredth of the speed of light.

"A minimum speed of 3,000 kilometers per second!"

Yang Meng answered Xiaoguang's question just now,

And Xiao Yi according to the earlier recorded Rutan scale conversion table,

This speed is translated into a speed that Koko can understand.

When I heard this speed, the small light on the screen began to flicker slightly.

"This speed is unimaginable, and it's no wonder you have to worry about the wear and tear on the outside of the spaceship!"