Having found evidence of the possible existence of a higher alien civilization, Chen Yu should normally be prepared to return quickly and bring his kind back to Earth safely.

But the existence of the R-type deep space ship made him full of confidence.

Human beings in 6877 are definitely an advanced civilization spanning multiple planetary systems.

Chen Yu does not believe that Proxima Centauri has a stronger civilization than humans in the 60th century.

In the world of technology, every era changes more than heaven and earth, let alone thousands of years apart.

Therefore, with only one civilian ship, Chen Yu has the confidence to beat the second-level civilization under the "Kardashev" system.

And this three-body galaxy will not have a second-level civilization or higher in any case, otherwise the solar system just a stone's throw away would have been colonized long ago......

What's more, if the blue ball of light was really a detector, then the existence of Chen Yu and his party had already been detected. For the sake of the safety of the Earth four light-years away, he has an obligation to investigate and solve the troubles that may pose a threat to the Earth.

Standing in place, Chen Yu looked at the dazzling twin stars in front of him, and his brain began to make various plans.

"I wonder if detonating a star here, four light-years away, will affect the solar system......

Half an hour later, the spacecraft was out of the planet's gravitational range, and Chen Yu immediately manipulated the hull of the ship, pushing the conventional sailing speed to the extreme, and began to rotate around the planet.

Looking at the rapidly rotating Red Planet at his feet, Chen Yu explained to the camera: "I am scanning this planet to find out whether it has life in 360°. There are two sets of built-in scanning systems in the spacecraft, a homogeneous substance analyzer and a circularly polarized life scanner, which cooperate with each other to complete the three-dimensional reconnaissance of the planet, which is very efficient. ”

"The theory was born in 3155, and the actual use was around 4000. As the name suggests, it is used to detect different nuclides of the same element with the same number of protons and different numbers of neutrons. Detection of these elements can provide a keen sense of the presence of 'artificial' elements in the planet that are above the standard amount. If there is, it means that there is a wise civilization here. And the level of civilization has reached the atomic level. ”

"Circularly polarized life scanners, the theory was born around 2019, and the actual use was in the thirtieth century. The detailed explanation of circular polarization is complex, involving physics, optics, and complex formulas. I'll just say it briefly, it doesn't matter if you don't understand it. ”

"The amino acids that make up the proteins of the human body are all left-handed versions of their respective molecules, and when light interacts with these long chains, it becomes circularly polarized. Its electromagnetic waves will propagate outwards in a spiral motion clockwise or counterclockwise. The so-called circular polarization scan is to detect whether there is circular polarization in the planet. If there is, it means that there is a living thing here. ”

"Two systems, the latter determines whether living beings exist, and the former verifies and determines whether living beings have reached the level of intelligent civilization. ”

"Of course, it is worth ironic......" Chen Yu shrugged: "According to the knowledge I have gained, the first practical use of the circularly polarized life scanner was not for the search for extraterrestrial life, but for war. Satellites are used to determine where people gather, and then targeted attacks. One dozen and one accurate, it's cool. ”

【……】

[Worthy of a human being. 】

[Worthy of human +1.] 】

[Zhente Niang's is a genius......]

[It's over, this reminder from the UP Lord, countries must start researching. 】

[Maybe it started a long time ago.] 】

[The last issue, please cherish it.] 】

During the explanation, the R-shaped deep space ship completed a circle of orbit around the planet, but there was no hint from the two systems.

Chen Yu's face was expressionless, he turned around and continued to fly along the equator.

A few minutes later, another lap was over, and there was still no sign of life.

"It doesn't seem to be on this planet. Chen Yu turned the spacecraft around and flew towards the two big stars: "It's normal, it's really not suitable for life to live here." Let's go to the binary star and have a look. I guess there should be quite a few planets there. ”

"It's a long way to get to Tianmen 2A and B, and you need to start faster-than-light travel. But to start faster-than-light, you have to run beyond the gravitational range of a red dwarf. Therefore, this period consumes at least more than ten minutes. ”

"Then let's make a very fun game in these ten minutes. ”

As he spoke, Chen Yu pointed in the direction of the solar system: "Look there, there's a star, right?"

The camera looks at the same time as everyone else in the boat.

"This beauty. Chen Yu walked to Xing Biqi in the corner: "I noticed that you have been looking at that star, do you know what it is?"

"The solar system. ”

"How do you know?"

"I... I remember where it was. ”

Being watched intently by everyone, Xing Biqi looked a little nervous. And thinking that hundreds of millions of people in the live broadcast room would see her, her mind was even more dizzy.

"That's right, that's the solar system. ”

Patting the girl on the shoulder, Chen Yu walked into the crowd and talked eloquently: "There must be people who are very curious, we walked four light years in four hours, and when we look back, can we see the earth four years ago?"

As soon as these words came out, the eyes of the interactors in the ship, hundreds of millions of viewers in the live broadcast room, and scientific researchers from various institutions all lit up!

It was an extremely interesting experiment for everyone.

The answer is yes. The solar system we see now is the solar system of four years ago, and the earth is also four years ago. With the built-in telescope technology of the spacecraft, it is easy to obtain most of the light information four light-years away, and it is not a problem to restore the image of the earth by filling it with a model from the 60th century. ”

"Let's start now and look at the Earth in 2017. ”

Chen Yu said to do it, without being verbose, and directly turned on the magnification function in the direction of the solar system.

"Huh!"

"Huh!"

"Whoa......

As the distance closes, the solar system, which once shines like a star, becomes like a full moon.

Jupiter and Saturn, not far away, are also clearly visible in the reflection of the sun.

"See? This is the solar system four years ago. The planetary position is completely different from what it is now. ”

As he spoke, he continued to zoom in.

"Whoa......

The blue earth appears in the picture......

【Awesome!】

[Earth four years ago!]

[I'm crossing!]

[Can you still zoom in on the anchor? 】

[Magical. 】

[I've decided!I'll study astrophysics in the future!!It's so romantic!]

[Brother, believe me, I'd rather go to medicine than get involved in astrophysics.] It's too late to turn back. 】

[This review is really high-energy! It's the same as watching a movie, a prickly chicken. 】

"You are on Earth in 2021, but you saw the Earth in 2017 through my live broadcast room. From a certain point of view, this can be regarded as a kind of time travel. ”

"But with my current position, I can't adjust the direction casually, so I can only see a corner of the eastern hemisphere, barely to the border with China. Should...... Now continue to zoom in and see how far the spaceship's telescope can see. ”

The words fell, and he manipulated the screen to zoom in again.

Including Xing Biqi, everyone in the hall hurriedly came behind Chen Yu, their eyes widened one by one, and they waited seriously for the next magical scene......