Annihilation of the solar system

The conference room was silent for a long time, and Zhou Cheng lit a cigarette. Although no one in the conference room, including Xia Jigang, smoked, no one cared about the slowly rising mist forming a faint dark cloud on the ceiling.

Under the subtle "buzzing" noise of the ventilation fan, Song Shi suddenly broke the calm:

"Is there a way to know the location of their parent star? This may help us further judge their intentions!"

Zhou Cheng put out the cigarette and shook his head lightly:

"From my side, there is no way to provide precise predictions. There is no basis for even speculation."

Director Yin also waved his hand helplessly:

"The vast sea of ​​​​stars is easier said than done. We have done panoramic sky surveys for so many years, and we have not found any clues. With the time left, I'm afraid..."

A deeper dark cloud shrouded everyone's faces.

"I have an idea." Shen Manling's words attracted everyone's attention.

Xia Jigang nodded and motioned for her to continue.

"Now that we have confirmed Professor Zhou's theory about the transmission capacity and energy required of wormholes, we can make a reasonable guess at the possible distance range of their parent stars. I think their parent stars will not be too close to us, nor will they be too close to us. It’s not too far.”

Song Shi frowned:

"We understand that it will not be too close. If it is close enough, such as dozens of light years. They have the ability to travel at 1/3 the speed of light, and they can come to the solar system through regular interstellar navigation and crush us like insects.

There is absolutely no need to open a wormhole 4 light-years away like now, transport unmanned probes to two satellites in the solar system, and then control and use the original creatures above to attack us. However, it is not too far away. What's the meaning?"

Shen Manling looked at the white dwarf star in the high-definition photo:

"According to Professor Zhou's relationship between wormhole transportation capabilities and energy. Limited by the upper limit of stars that can stably provide energy, they also have an upper limit for transporting fleets through wormholes. This means that even if their technology is mature, transportation through wormholes Technology can only be transported by space battleships, but it is unlikely to be a large-scale immigrant fleet. "

A look of anxiety flashed across Xia Jigang's face. The location of the alien civilization's mother planet was not what he cared about. Moreover, Shen Manling's speculation seemed to have missed the point. But because of Zhou Cheng, he just ignored it. He said something.

"Then what does this have to do with the location of the alien civilization's home planet?"

Shen Manling continued:

"I think that all their actions now seem to be to destroy humans, not to destroy the earth. Their purpose may be to occupy the earth. Because, from our cosmological point of view, among the known habitable zone planets, the earth's The environment is like heaven.”

On this point, everyone nodded by default.

"So, after they occupy the Earth, they will carry out large-scale interstellar migration. I think this is their ultimate goal of migrating their people to the Earth. Therefore, if their parent star is too far away from the solar system, , even if they occupy the earth, even if they have the ability to sail at 1/3 the speed of light.

The vast universe is still a huge barrier they have to face. If it takes tens of thousands or even hundreds of thousands of years of conventional interstellar navigation to reach the Earth, I think the Earth will have little meaning to them."

After hearing this, Xia Jigang's attitude changed somewhat:

"So, what is your guess?"

Shen Manying thought for a while:

"I can't give the exact number. But the order of magnitude, I think it should be within hundreds of light years."

Xia Jigang looked at Director Yin:

“Is there a way to survey star systems within hundreds of light-years?”

Director Yin looked troubled:

"It is not difficult to scan a star of this scale, but it is very difficult to determine the planetary system carried by the star. Our current way of observing extrasolar planets is still to analyze the light variation period of the star.

That is to say, the planet moves to the transit plane relative to the star, causing a weak change in the star's luminosity to be effectively detected. But this depends on luck. Some planets have orbital periods as long as hundreds of years. We may not have that much time at all! "

"There is another way." Shen Manling said.

"What can I do?" Director Yin looked at Shen Manling in surprise.

"Gravitational lensing!"

The angry surprise on Director Yin's face faded away again:

"Of course I know about gravitational lensing, but that requires a massive celestial body between our observation point and the target star system to cause space-time curvature, and the light passing through the space-time curvature forms a lens amplification effect to be able to observe it. We don't even have the target star. ....”

Speaking of this, Director Yin suddenly stopped. His pale face suddenly turned red with excitement:

"You mean...using the sun as a gravitational lens?"

Shen Manling nodded, Song Shi also understood what she meant, and he said excitedly:

"We can fix the space telescope on the spacecraft through a mechanical arm, and then let the spacecraft fly around the sun along a specific orbit, thereby using the sun's gravitational lensing effect to observe the entire sky area we need!"

"Although the hope that this will allow us to directly discover the home planet of alien civilization is still very slim, there is always a possibility. And it can be achieved directly by using on-orbit aircraft without spending more resources. I think it is feasible! "Zhou Cheng said.

Everyone looked at Xia Jigang, and finally he nodded.

An urgently modified Shenzhou spacecraft was launched directly to Xia Lan's space location by a super-heavy carrier rocket. Watching Lu Yuanzhou remotely control the robotic arm to install the "Gaoming" space telescope onto the Shenzhou spacecraft, the excitement in Wei Xu's eyes was gone. It turned into a complex expression of relief.

Human beings, both physically and mentally, have evolved for survival on the ground. Long-term space life has made him yearn to return to the ground.

"It's up to you to help us with the rest of the work!" Wei Xu looked through the porthole at the spacecraft with the telescope next to him, with a hint of excitement in his words.

"Well, this unmanned spacecraft will complete the next multi-orbit flight around the sun with the telescope, and we can return home." Lu Yuanzhou said.

During the boring return voyage, there was no hard work to be done except for daily physical exercise. Although the starry sky outside the porthole window was still bright, it was less romantic and more murderous in the eyes of humans.

Xia Lan looked at the space photos taken by the "Gaoming" through the gravitational lens effect of the sun on the computer. In those photos, the blurry light spots like candles on the roof of the building opposite are distant stars. And such photos may There are thousands of them.

"Sister, after returning to the ground, let's automatically filter through the computer and then analyze it. There are too many original photos now, and it is difficult to find what we want." Wei Xu said.

Xia Lan continued to look through the photos on the computer:

"Yeah, I know. I just want to see them."

Wei Xu floated up and came to the porthole. The earth outside was already very close to them. From the current angle, half of the earth was as clear as blue agate, and the other half was as dark as ink. At the intersection of black and white

, a morning and evening line of right and wrong separates them.