Chapter 200

Zhang Yuan carefully pondered over the astronomical data. He saw a circle of yellow with purple on glize 581g. This circle of yellow and purple, widely distributed in the twilight line, seems very neat, not natural.

Because the spacecraft is seven astronomical units away from the planet, the resolution of the photo is not high, and we don't know what it is.

"Professor Fan, have you found any traces of intelligent life?" Captain Zhao also saw the picture, pondered for a while, and asked.

The astronomer immediately replied, "well There is no intelligent life yet. The detector we launched is still on the journey. But for now, there are no regular electromagnetic waves found in space. "

"There are no satellites or large buildings on the surface..." "What are these yellow ones?" Zhang Yuan asked? Such a regular global spectacle can't be formed naturally, can it

Professor Fan said: "these unusual colors are probably a large number of alien plants, but the colors are slightly different from those on earth. Large areas of virgin forest on our earth are green, and the plants here are yellow and purple... "

"We suspect that these creatures don't need oxygen, and they get energy through the reactions of sulfur and nitrogen oxides. This breathing mode is essentially different from our aerobic breathing."

Alien life?

Zhang Yuan's heart leaped heavily, and many people sitting around also couldn't help discussing it in a low voice.

In particular, some biologists, compared with the sense of crisis, are mostly excited. For them, any bit of alien life has a strong reference and guidance significance for the origin of life and other issues.

"These stars are locked in by the tide. The side opposite the star is too cold, the side facing the star is too hot, and the dusk line is not hot or cold, which is a very good place to live

"The large life community located at dusk line can receive eternal light and suitable temperature..."

"The strength of life is incredible."

"Cough, please be quiet. In a few days, the satellite will be able to send back the first-hand information But I think... "

The professor said a lot. He means that according to the current data, there is a greater probability that there is no intelligent life. Even if there is intelligent life, it is likely that there are only some indigenous people, so it is not enough to be afraid.

Anyway, as long as these lives do not have the ability to threaten human beings, there is nothing to worry about.

When human beings have reached a certain stage of development, they will certainly have to make a more detailed field investigation on the life of this planet.

Zhang Yuan and many of you are relieved. What they are most worried about is that there is a strong interstellar civilization in this region Even if the probability is very small, once this civilization exists, they will undoubtedly become a turtle in a jar.

"It's impossible for civilization to develop into the space age without electromagnetic waves or satellites, isn't it?"

"Yes."

Listening to the public discussion, Zhang Yuan stood up and said: "for the sake of caution, we should try our best to shield the radio waves of the spacecraft itself until more specific information appears."

The proposal was soon adopted unanimously.

Next, after a series of discussions, combined with the various mechanical equipment carried on the spacecraft, we chose the No. 1 satellite closest to glize 581g for development.

The six major planets are called B, C, D, e, F, G, etc., which are named according to the order of human discovery. But the satellites attached to these planets have not been named. For the sake of simplicity, people directly call the largest satellite of 581g as No.1.

The satellite is nearly 4000 kilometers in diameter, bare, and its surface is full of craters. Its revolution period is about 14 days.

In addition, due to the tidal locking, its rotation period is equal to the revolution period.

The reason for choosing satellite 1 is that it is at a moderate distance from the star. Even if the star erupts, the spacecraft will not be affected too much. And theoretically, according to the formation conditions of the planet, it has all the resources needed by human beings, including all kinds of common metals, rare elements, radioactive elements and so on.

The only drawback is that it is relatively close to the planet of life, and there may be some potential threats. Life always has infinite possibilities, who knows what strange life there will be.

However, the distance between the satellite and the planet is 360000 km. If anything happens, there will be time to respond. Zhang Yuan doesn't believe that any living creature can break free from the gravity of the planet and jump onto the earth age by virtue of its own body.

Therefore, being closer to the planet of life is not necessarily a disadvantage. On the contrary, it may also be an advantage. At least in the future, scientific research will be more convenient.

Compared with other planets, which may have irreparable defects, No. 1 is already quite a good planet.

"But, Lao Zhang, at this rotational speed, if a space elevator is installed on this planet, the height of the synchronous orbit will be very exaggerated!"Ye Kaifu whispered under his seat: "the rotation speed of this planet is too slow. I calculated it casually. The height of the synchronous orbit is more than 80000 km. We don't carry so many raw materials What shall we do? "

"No, you're wrong..."

Zhang Yuan laughed and pointed out: "in this case, the installation of the space elevator has to consider the huge gravity of another planet. Therefore, our spacecraft will not stay in the synchronous orbit directly... "

"You can calculate the gravity of the satellite, cancel out the gravity of the planet, and then use the rest to calculate..." "That's right!" he said

Ye Kaifu suddenly realized, "I haven't touched this thing for several years, but I forgot it. Fortunately, I didn't ask questions directly, otherwise I would lose my face."

After careful calculation, he found that it took only 8000 kilometers to get the orbital height, and he could not help but feel secretly happy.

This distance is good, the construction difficulty of the space elevator is greatly reduced, and there is no need to worry about anything.

As for energy

"Enough uranium should be found on the planet to support the first few steps of human development."

Moreover, in the case of sufficient light, we can consider laying solar panels on the sun side of the planet to replace nuclear energy. Solar panels are a very cheap and simple technology. Zhang Yuan thinks that with the equipment currently carried by the spaceship, mass production can be achieved in one or two years.

After some discussion, Captain Zhao said with great pride: "it's So it's decided to open our first landing point on satellite 1! "

……