In this way, a full 30 years of deceleration will reduce the fleet's speed to a speed of tens of kilometers per second relative to the sun by the time it reaches the solar system. When the time comes, it will be much easier to do whatever you want to do.

"Solar system, I'm coming."

Staring at the bright, but indistinguishable star from the rest of the stars, Mo Zhuo said silently in his heart.

"This will be the starting point for our civilization to take off again. I swear, definitely. ”

At the moment, the solar system, above Ganymede.

The data reported by an infrared telescope caught Chen Yue's attention and made Chen Yue fall into doubt.

"An infrared ray source suddenly appeared in the four directions of Tianyuan? Strange, what's going on? ”

Infrared light is more penetrating than visible light. Some small stars that are not visible at all in the visible band are clearly visible in the infrared band. It was precisely because of the development of infrared astronomy that human civilization found many new stars around the sun that had never been seen before.

Chen Yue is naturally the same. For hundreds of years, he has not let up in infrared astronomy.

The source of infrared rays that suddenly appears at this moment has very different characteristics from the infrared rays of stars. In particular, it appeared out of nowhere, and it was even more bizarre.

Chen Yue transferred some of the computing power here and began to observe more closely. This observation didn't matter, and immediately, a piece of data shocked Chen Yue.

"What's that? Such a big blue shift? ”

It's like sound. When a train approaches at a very high speed, one can hear an increasingly high-pitched sound. When the train moved away, the sound suddenly became muffled.

The same goes for light. The characteristics of the light observed by a light source when it is close to the observation device are different from those observed when the light source is far away from the equipment.

The feature of the proximity of the light source is called the blue shift. The feature of a light source that is far away is called redshift.

A larger blueshift or redshift means that the light source will move closer or farther away.

At this moment, Chen Yue observed a great blue shift from this light source that suddenly appeared. This means that it is approaching itself at a very high speed.

With just a few calculations, Chen Yue came up with its speed.

The conclusion is almost up to 30,000 kilometers per second, almost 10% of the speed of light!

That's an astonishing speed. It is almost impossible for such a high-speed star to form under the natural environment of the universe.

Since it is not a natural formation, it can only be a man-made object.

So......

"It's an alien spaceship! It must be an alien spaceship! ”

Chen Yue immediately came to this inference and immediately became nervous.

"Could it be that after hundreds of years of calm, the war that happened in Wang Liang's three-star system finally affected me?"

Chen Yue's first thought was to flee immediately and escape to other star systems to continue his development.

At this stage, he has only just mastered the theoretical ability of interstellar navigation, and he really has no confidence to deal with an enemy who can come to the solar system from another star system on a large scale.

But......

It is estimated that the alien fleet meant by that light source will reach the solar system in nine or ten years at most. And now, he doesn't even have a spaceship that can carry out interstellar voyages.

Theoretically, he has the ability to travel interstellarly, which means that Chen Yue, after theoretical calculations, believes that under ideal conditions, he should be able to reach another star system that is not too far away by using deuterium-tritium nuclear fusion as energy and ion propulsion as the power.

But he hasn't verified it yet. Whether it will actually work or not, only God knows.

Besides, even if you want to rush into an interstellar voyage and escape the solar system to another star system now, at least there must be a suitable spaceship.

These self-built intragalactic transport ships, as well as many combat ships, do not have the ability to travel interstellar distances. It has to be a big transport ship.

Ten years is simply not enough to build an interstellar transport ship by yourself.

It is impossible to escape.

"."

Chen Yue secretly cursed.

He mobilized more observational forces to aim at the light source, measuring as much information and intelligence as he could.

Gradually, Chen Yue discovered......

This menacing alien fleet has a ...... level of technology It doesn't seem to be as high as you think?

Why did they start slowing down almost a light-year away from the solar system? The rate of deceleration, almost a few centimeters per square second?

What does their top speed seem to be at 10% of the speed of light?

Although the speed of 10% of the speed of light is amazing, it is actually not far away from Chen Yue.

Chen Yue has also been accumulating skills for interstellar navigation. Sixty years ago, he launched a research ship to the edge of the solar system, exploring the environment at the edge of the solar system and verifying the feasibility of a long-endurance acceleration engine.

As of today, it has been flying for 60 years.

For the first two decades, it has been accelerating, even accumulating its speed to 4% of the speed of light, or 12,000 kilometers per second.

A few years ago, through the sixteen large array antennas laid in orbit around the sun, Chen Yue still kept in touch with him, which was already 5 trillion kilometers away from him, almost 0.52 light years.

Later, the distance was too far away, and the contact was disconnected.

This test showed that a speed of 10% of the speed of light was not far away for Chen Yue. There is a high probability that he can do it.

Based on this situation, Chen Yue once again made a guess.

"Perhaps...... This alien civilization from afar has the same level of technology as me? Is it just barely able to make an interstellar voyage? ”

Subsequently, with the arrival of more observation information, Chen Yue became more and more sure of his guess.

"They seem to be using ion thrusters, too...... The efficiency should be higher than mine, I don't know how much higher, but it shouldn't be much, otherwise the spectrum shouldn't be what it is now. ”

Synthesizing all kinds of information, Chen Yue finally made a decision.

"If you can't run, then stay! Besides, they don't have to come to war with me. I'm just adapting, it's really not good, then fight! ”

Of course, war is the most unavoidable option. If we can live in peace, then of course it is best.

In particular, Chen Yue was almost ignorant of things outside the solar system at the moment. He didn't know if civilizations outside the solar system were related to each other, whether there were alliances or anything like that, or if there was anything like a so-called civilization code. If so, what are the guidelines?

It would be great if we could live in peace and know this information from this civilization.