As a member of the scientific research team, Zhang Yuan was one of the first people to land on Europa.

He carefully stepped down the space elevator and walked on Europa's ice sheet. In the dark sky, only a few lights were shining. These permafrost ice layers have never melted since they appeared, at least for more than a billion years.

If you look up, you can see Jupiter.

It's really overwhelming. Its area is about 23.5 times that of the earth when it saw the moon. Visible to the naked eye, there are many wood like lines on the surface of Jupiter.

Sometimes you can see the famous, dark red erythema, just like a huge eye, watching them quietly.

If some people who are afraid of ghost stories see this round of real blood moon, they may be scared to death.

Zhang Yuan took some pictures with great interest.

The reason why we chose the tide locked side as the base is that this place is less likely to be attacked by meteorites.

Jupiter, the big guy, cleaned up countless meteorites for the inner planets of the solar system. With Jupiter as a shield, the probability of the earth being hit by meteorites is much smaller, providing a more favorable environment for the formation of life.

But Europa is not so lucky. Living here, the probability of being hit by meteorites is greatly improved.

The whole base is also equipped with the most powerful helium-3 nuclear bomb to resist possible meteorites. No way. Who makes Jupiter the most important nuclear fuel bank?

"Dear friends, welcome to Europa industrial base. The edge of human space deployment. " A middle-aged man in a spacesuit stood at the gate of the base and said hello to everyone with a smile.

Then he shook hands with the captain.

Academician Ding looked back and said to Zhang Yuan, "come on, this alien base may be similar to our future deployment But we should have a good visit. "

"I have some old friends here who want to visit. Would you like to come with me or move freely?"

Zhang Yuan thought, "I also have an elder who wants to visit. Let's move freely for a while

"I'll see you in the afternoon."

The first thing Zhang Yuan did when he walked into Europa base was that Meimei had a barbecue meal!

The smell of barbecue made him salivate and salivate. It was like doing math problems!

Even if the taste is not as good as the big meal on earth, it's not synthetic meat at all.

Europa base, compared with the take-off ship, is a paradise!

"Not bad, not bad! You solved the turbulence problem! " The middle-aged man sitting opposite him, a former colleague of his father, thumbed up and praised repeatedly.

"Uncle yuan, it's just luck. A numerical simulation method, in fact, has not been completely solved.... " Zhang Yuan said with a embarrassed smile.

"Luck? It depends on strength! You think I don't know what to do? There are many applications of turbulence. From astronomy to geography, look at Jupiter. Isn't the great red spot formed by turbulence? By the way, what time does the meeting start? "

"About one o'clock in the afternoon." Zhang Yuan replied.

"It'll give you a little rest."

They were invited to Europa for an industrial conference.

In this base, there are many existing achievements, which are the crystallization of human wisdom and are worth learning.

In fact, the large-scale buildings inside the ice sheet are very particular. All kinds of heat dissipation, support, sewage and other structures need overall planning. In particular, the heat emitted should not exceed the bearing capacity of the entire ice sheet, otherwise too much melting of ice may cause landslides, earthquakes and other malignant accidents.

Europa, as a relatively successful immigrant planet, will surely benefit from on-the-spot investigation and learning more new things.

"Uncle yuan, when are you going to return to earth?" Zhang Yuan patted his stomach with satisfaction and asked again.

"In three months, it will be three years. I will never come to this ghost place again. I have no real-time video and haven't seen my son and daughter for a long time. The muscles are beginning to atrophy. If you don't go back, you will have a green grassland on your head. "

"How can..." Zhang Yuan had a quick fight.

Europa is the most important resource of a civilization energy. So here is equivalent to the Middle East region before, and the salary must be the top.

The average worker has a work cycle of about three years.

Even the lowest position can earn millions.

However, as we are far away from the center of civilization, although we have money, we have no way to enjoy it, and it is impossible to take care of our family, so we are bound to take some risks All kinds of bullshit, hard to earn money back, the results found that the story of wearing a green hat, simply countless.

"There's something else I want to bring back to earth. I can be a courier for you." Uncle Yuan said with a smile.

"Well..." Zhang Yuan thought, "do you have postcards? I'll just send some postcards back. "

"Yes, there are just a few more. Here you are."After thinking for a while, Zhang Yuan wrote several letters to Wang Lili, Xu Yunjing, Professor Wang Zhong, his aunt's family and Han ziyue.

It's very brief. It's about my recent experience and feeling.

When he wrote Han ziyue's letter, Zhang Yuan was stunned. He didn't know what to write.

"Why, a girl?"

"Ah, a lovely girl. I don't know what's going on. "

"So..." Uncle yuan smiles as if he understands.

What do you write?

Zhang Yuan had an idea and drew a picture of himself on the postcard. There is a planet floating in the sky, that is, Jupiter.

His sketch level is not so good, just follow the painter Elvin simple learning. The whole picture looks crooked, uglier than himself.

However, just because of ugliness, it seems to have a sense of inexplicable humor.

Sign your name below.

[Zhang Yuan, 2265.8.31]

there is no chance to accompany you all the way, no excuse to have a long talk with you all night, and no chance to tell you my life now. I can only send a postcard to tell you that I'm fine. It's better to miss each other than to meet.

Cherish each other.

Zhang Yuan sighed in his heart.

Finally, he left one for himself.

After careful consideration, he wrote: "today, we come to Europa, the most peripheral industrial base of mankind, where the carrier will make the last replenishment of resources. Europa can't compare with the earth, but it's more stable than the spaceship. After all, it's a planet. 】

[next, we will go to the distant starry sky. We don't know when we can reach another planet. 】

[it's a long night, I don't know the road ahead. I hope that in the future, we can remember this beautiful and warm day. 】

[2265.8.31]

it's finished, but it's inexplicably heavy.

Zhang Yuan raised his head and said, "I'll keep this one by myself. After you return to the earth, you can help me put it in the mailbox."

"Well, that's a little thing. I'm so outsider Uncle yuan collected the stack of postcards and nodded solemnly.

"Thank you! I'll go first. "