But what about now? Aliens took the initiative to come to the door to communicate, and humans greeted them generously at their doorstep!

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

Just when the two of them were imagining the future, a prompt suddenly sounded in their ears, "Dear citizen of new human civilization, Mr. Zhang Yuan, hello, the standard room you booked in the Star Port has entered the queue sequence, and there are still 132 rooms left to choose from." ”

This voice surprised Zhang Yuan a little, because there are many tourists in the port, and the rooms are limited, and there are usually queues for several months.

If they don't get in line, they have to go back to the surface to live.

I didn't expect it to be booked on the last day of this holiday, which gave the two of them 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!" Sleep on what no gravity, frightened, always have nightmares......"

Zhang Yuan stared at the screen for a long time, and suddenly said, "It's really unemotional!" I still want to sleep in some 'golden ratio gravity environment' room, and there is just the last one. ”

"The golden section?"

"It is said that in this gravity environment, people's blood circulation is very smooth, and the body will be very light, young boys and girls like it very much, haha...... It's hard to get a room like this. ”

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

A good night passed quickly......

The next day, everyone started their normal work.

At six o'clock in the morning, a large number of people were already waiting at the location of the observatory, until nine o'clock in the morning, people finally found the traces of the curvature ship of the Toth civilization, which was a rather large spaceship, estimated to carry a population of about 1 million, sailing at a speed of 0.1C.

If it weren't for the strong light emitted by this spaceship, ordinary radar would really not be able to lock on to this spaceship.

"Conventional radar must be updated! With such a large spaceship, there is still no way to lock it, so what can I do if I start a war in the future? "Several generals were there, very dissatisfied with the current military equipment.

It wasn't until about six million kilometers near this starry harbor that the ship came to an abrupt stop, as if there was no slowdown.

That's right, curvature sailing is such a magical way to sail.

Of course, there are limitations to using curvature to sail, the curvature engine has strict requirements for space curvature, and there is no way to sail in a place with high gravity, otherwise it may cause a certain amount of damage to the engine itself, at least the engine will explode directly, or at worst it will produce a super strong gravitational wave, which will tear the entire spaceship apart directly!

Therefore, in order not to lose maneuverability, the spacecraft still has to be equipped with conventional means of navigation.

With a slight shock, the large mothership of the Toth civilization docked with the starry sky harbor, and the bright indicator light lit up.

"Welcome, welcome dear friends!" The captain's lady took the lead in sending out condolences.

People cheered loudly, cheering for the arrival of these old friends, and a fairly nice ecological environment was prepared for them.

The reason why the Toth civilization is willing to take the initiative to come here and bring such a large number of people here is for scientific and technological exchanges, such as the exchange of some experience in curvature technology, telling about the past friendship, cultural exchanges, military exchanges, and so on.

On the other hand, it is mainly about optical perception.

Yes, optical perception!

Without optical perception, the technology tree of the Thoth civilization is too deformed, and there is also competition between the four civilizations, and the Thoths must make up for the shortcomings in this area in order to develop better.

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

Soon, the heads of state of the two sides came into contact with each other, expressed their condolences to each other, and told about their historical origins, historical friendship, and so on, which sounded quite boring. It's really boring, it's a necessary process.

Then began to arrange people-to-people exchanges as well as meetings of scientists.

Of the 100 million people of mankind, more than 60 million are new generations, and it is the first time they have seen this alien civilization that is closely related to human beings.

The combination of a large baby fish and a wolfdog is very interesting. These dogs were also wearing power armor, and when they saw so many humans, they were curious to die, and they barked "whoa, whoa, whoa".

According to the thinking of many young people, the other party came over with a population of one million like this, and it is true that the relationship is good enough to be like this.

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

Breaking through the fourth-level civilization together is definitely a very deep friendship, in the galaxy, how many third-level civilizations can become fourth-level civilizations?

The small contradictions that have occurred in the past can only be experienced by some elderly people, is that a contradiction? In the face of the final result, there is definitely no contradiction!

Soon, many smaller spaceships began to compete in speed, and the space weapons tour made some military fans addicted.

It is very interesting to observe these sub-light ships from the surface, and you will see that their shapes are pulled into "long noodles". Whoever has the longer noodles tells who flies faster.

In fact, it is not that the spacecraft is deformed, nor is it a relativistic effect, but that the observation of the spacecraft's images is disordered due to the excessive speed.

As for the military level, the battle in the sub-light speed state is also different from the conventional military war, for example, the ultra-high speed curvature missile has become a big killer, and how to make a sharp turn in the curvature navigation has become a super problem.

The two sides can jointly study new content in this area, compete with each other, and exercise, and having one competitor will certainly develop much faster than alone.

“…… Hello New Humans. As for the difficulties in curvature technology, there are many, many more. The first level is about a series of problems caused by breaking through the speed of light, referred to as the light barrier. ”

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

"In addition, after breaking through the light barrier, it will also bring a large amount of confusion in the observation screen, and the faster the speed, the faster the blurred the image. It's definitely not safe to fly around with your eyes closed...... We have to find the right algorithm......"

Standing on the stage to speak was Tokaria An, the great scientist of the Toth civilization, and what he said was actually not complicated, and almost everyone could understand it. This is also part of the communication between each other.

When a spaceship catches up with the photons it emits, it produces all sorts of strange phenomena.

If you look directly in front of the ship, you will notice it...... It's actually "backing up"!

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

If you look at it from the side of the ship, it's even more bizarre, it turns into a ramen-like shape, and then this ramen breaks off from the middle and splits into two ships flying in opposite directions. Of course, these ships are just images.

All in all, these strange situations will become difficult in communication.