Fooling Tomoko into being a system

Zhang Beihai contacted Zhang Qian, a scientific expert onboard the Natural Selection, and asked.

"Is there a way for us to observe the wake of the light-speed spacecraft left by the Trisolaran fleet in the universe?"

Since the problem of Trisolaran civilization cannot be clarified for the time being, we must start from the source of the matter and first understand that the information of Trisolaran civilization will always be correct.

Zhang Gan spoke to Zhang Beihai a long list of proper nouns that only scientists could understand. Seeing his confused eyes, he gradually stopped and stopped his lips. It seemed that he had emotional intelligence, but not much.

After thinking about it, he simplified it and chose to tell Zhang Beihai the principle of the Dark Forest Strike Early Warning System. Current human civilization can only use the radiation generated by friction to detect objects moving at the speed of light. Current human civilization technology cannot intuitively detect spacecraft and objects moving at the speed of light. The wake left by a light speed ship.

The strike early warning system is a very primitive but most suitable system for current human civilization.

At present, human civilization's means of discovering the wakes of light-speed spacecraft are still at a very primitive stage.

Most of them learn the principle of dolphin sonar, which emits electromagnetic waves or gravitational waves to a certain area of ​​the universe for positioning. If the return signal is not received within a predetermined time, it will be assumed that there is a problem in this area, eliminating other signal interference problems in the universe. There is a high probability that you can get the wake left by the light speed spacecraft.

This detection method is very dangerous in the universe, and there is a possibility that the starship Earth may be discovered by civilizations in the dark forest. Zhang Qian does not recommend Zhang Beihai to use this kind of sonar detection and positioning system.

Zhang Beihai didn't expect that just detecting light flight contrails would be so difficult. At the same time, he once again realized how backward Starship Earth's technology was.

Seeing that Zhang Beihai was still frowning, Zhang Gan thought for a while and gritted his teeth and said, "Maybe I can still find a way!"

"any solution?"

“I need to apply for the right to use the fish tank!

We can directly observe the traces left by the three-dimensional universe from the four-dimensional space in the fish tank. The wake of the light-speed spacecraft in the four-dimensional space looks like a translucent mist. This is because the speed of light in it is reduced. Distortion of light is a phenomenon we usually call 'slow fog'.

Of course, due to the limitations of the human body, it is not an easy task to use the naked eye to find the slender slow fog in the four-dimensional space where information is extremely huge. It requires the use of astronomical telescopes and a large number of manpower that we have crammed into the four-dimensional space! "

Zhang Beihai pondered for a moment after hearing Zhang Qian's method, then discussed it with Chu Yan, Dongfang Xuexuan and others, and immediately agreed to use the fish tank.

Many people who specialize in four-dimensional observation sit in a small spacecraft inside a starship and are pushed into a fish tank, preparing to go to an astronomical telescope built in the four-dimensional space. This is not a simple and pleasant job.

When walking in the four-dimensional space, you must pay attention to every organ in the body. Everyone must put aside distracting thoughts and cannot touch anything at will, because it may tear out the hearts of teammates!

This was a real accident. Fortunately, the heart that was taken out could beat outside the body and was carefully put back in.

The three-dimensional universe in the four-dimensional space is like the pages of a book. Even if you know the approximate flight path of the Trisolaran fleet, you still have to spend a lot of time using your naked eyes to search for the translucent slow mist in the gorgeous pages.

Starship Earth has conducted extensive analysis on the behavior of Trisolaran civilization, and several of these issues are like indestructible rocks.

In particular, why didn’t the Trisolaran civilization attack the starship Earth to test for intelligence?

This problem is like an abyss before them. Because they cannot solve it correctly, the crew can only ignore this problem or pray to the gods.