But now? Aliens came to communicate with each other on their own initiative, and humans greeted them openly at their doorstep!

This is the change of the times, the changes in human vision and strength...

Just as the two of them were imagining the future, a reminder suddenly sounded in their ears, "Dear new human civilization citizen, Mr. Zhang Yuan, the standard room you booked in the Starry Sky Port has entered the queue sequence, and there are 132 rooms left to choose."

This sound surprised Zhang Yuan a little. This was because there were many tourists at the port and limited rooms, so it usually took several months to queue.

If they are not in line, they will have to return to the surface to live.

Unexpectedly, I booked it on the last day of this holiday, which gave the two a small surprise.

"We can sleep here today! What room do you want to sleep in? Low gravity, no gravity, or normal gravity?"

Lin Xuanxuan thought for a while, "Of course it's normal gravity! You don't have gravity when sleeping, you're scared, you always have nightmares..."

Zhang Yuan stared at the screen for a long time and suddenly said, "It's so unconventional! I want to sleep in the room of the 'Golden Partition-Gratility Environment', and there's the last one."

“Golden division?”

"It is said that in this gravity environment, the blood circulation of people is very smooth and the body will be very light. Young boys and girls like it very much. Haha... This kind of room is difficult to book."

Lin Xuanxuan rolled her eyes, and was a little curious about what the so-called "golden division ratio gravity environment" is...

A wonderful night passed quickly...

The next day, everyone started working normally.

At six o'clock in the morning, a large wave of people were already waiting at the observatory. Until nine o'clock in the morning, people finally discovered the traces of the Toss civilization's curvature spacecraft, which was a very large spacecraft, expected to carry about 1 million people and sailed at a speed of 0.1.

If it weren't for the strong light of this spacecraft, ordinary radar wouldn't be able to lock the spacecraft.

"Regular radar must be updated! Such a large spacecraft still cannot be locked. What should I do if I start a war in the future?" Several generals were there, very dissatisfied with the current military equipment.

It was not until about 6 million kilometers near the starry sky port that the spacecraft suddenly stopped, as if there was no slowdown in the middle.

That's right, curvature navigation is such a magical way of navigation.

Of course, there are limitations to using curvature navigation. The curvature engine has strict requirements on space curvature and there is no way to navigate in places with high gravity. Otherwise, it may cause a certain amount of damage to the engine itself. At the very least, the engine explodes directly, and at the worst, it will generate a super gravitational wave, which will directly tear the entire spacecraft apart!

Therefore, in order not to lose mobility, the spacecraft still needs to be equipped with conventional navigation methods.

With a slight vibration, the large mothership of the Toss civilization docked onto the Starry Sky Port, and a bright indicator light illuminated.

"Welcome, dear friends!" The captain took the lead in sending condolences.

People cheered loudly, cheering for the arrival of these old friends, and preparing a very good ecological environment for them.

The reason why Toss civilization was willing to come here on the voluntary basis was to bring such a large population to exchange science and technology, such as the exchange of experience in curvature technology, telling about past friendships, cultural exchanges, military exchanges, etc.

On the other hand, it is mainly to seek optical perception.

Yes, optical perception!

Without optical perception, the Toss civilization technology tree is too deformed, and there are competition among level 4 civilizations. The Toss people must make up for this defect in order to develop better.

As an expert in extra perception, Zhang Yuan naturally has a high status and stands at the forefront of the welcoming team.

Soon, the leaders of both sides contacted each other, comforted each other, told about their past historical origins, historical friendships, etc., which sounded quite boring. It was indeed boring, and it was indeed a necessary process.

Then start to arrange civil exchanges and scientist meetings.

Of the 100 million human populations, more than 60 million are the new generation. This is the first time they have seen this alien civilization closely related to humans.

The combination of large giant salamander and wolfdog is very interesting. These dogs are also wearing power armor. Seeing so many humans, they are curious and yelling "awoo" around.

According to the ideas of many young people, the other party came here with a million people, and it was indeed because the relationship was good enough to a certain extent.

Since the relationship between the government is good, there will naturally be no problems among the people.

It is definitely a very profound friendship to break through the fourth-level civilization together. In the Milky Way, how many third-level civilizations can become fourth-level civilizations?

Only some elderly people can understand the small conflicts that have happened before. Can that be considered a contradiction? In the face of the final results, it is definitely not a contradiction!

Soon, many small spacecraft began to compete in speed, and the space weapons tour show made some military fans excited.

Observing these sub-light speed spacecraft from the surface is very interesting, and you will find that their shapes are pulled into "long noodles". Whose noodles are longer means who flies faster.

In fact, it is not that the spacecraft has deformed or relativistic effects, but that the spacecraft's image has undergone observation disorder due to its too fast speed.

As for the military level, combat under sub-light speed is also different from conventional military wars. For example, ultra-high speed curvature missiles have become big killers, and how to make a big turn in curvature navigation has become a super problem.

Both sides can jointly study new content in this area, compete with each other and exercise, and having a competitor will definitely develop much faster than alone.

"...Hello, new human friends. As for the difficulties in curvature technology, there are actually many more. The first level is about a series of problems brought about by breaking through the speed of light, referred to as light barriers for short."

"First of all, after breaking through the optical barrier, our spacecraft is faster than photons. How should we communicate with each other? Whether it is conventional flight or cellular linkage between military spacecraft, communication is crucial!"

"In addition, after breaking through the light barrier, it will also cause a large confusion of the observation picture. The faster the speed, the faster the picture is. It is definitely unsafe to fly around with your eyes closed... We must find a suitable algorithm..."

Standing on the stage, Tokalia An, a great scientist of Toss civilization, explained that what he said was not complicated and almost everyone could understand. This is also a part of communication between each other.

After a spaceship catches up with the photons it emits, various strange phenomena will occur.

If you observe from the front of the spacecraft, you will find that it... is actually "retreating"!

If you observe from the rear of the spacecraft, you will find that the image it causes is still the speed of light, and there is no "super light speed" at all!

If you observe from the side of the spacecraft, it will be even more strange. It turns into a ramen shape, and then the ramen is broken from the middle and divided into two spacecraft flying in the opposite direction. Of course, these spacecraft are just images.
Chapter completed!