The counselor said hoarsely, "dear students, at present, the distance between our planet and the big ice hockey behind us is about 2022100 kilometers, which is 1.3% different from the original estimate. The distance shortened every ten years is about 10000 kilometers... "

The two planets do not revolve around each other, but are in almost the same orbit in a forward-backward arrangement.

That is, the two sides move together in an elliptical motion around the center of mass of the two neutron stars.

However, the gravitational attraction between planets is inversely proportional to the quadratic power of distance. The closer the two planets are, the greater the gravitational attraction will be, and the closer they will be to each other.

At present, the distance shortened every ten years is about 10000 kilometers, but in the next ten years, it may be shortened by 11000 kilometers, and so on. Finally, it gets faster and faster until it collides with each other.

"... therefore, we must maintain a stable construction speed and increase the driving force of the planetary engine in order to avoid collisions between planets."

Here, the special vehicle for this big social class finally reached the peak. People saw countless excavators digging in a large basin, and these ores were transported and crushed by rail trains.

These ores are basically ordinary silicates and have no smelting value. They will become working medium and violent plasma jet out.

The future work of Wang Haifeng and other people is basically in this regard. This project looks very simple, but it is actually very complex, starting from mining, transportation, crushing and finally turning into fuel.

A large construction site needs more than 100000 people, and the number of robots and various machines is at least more than 10 million.

Although most of the work is automated, there will always be some mechanical faults and mechanical maintenance to do.

The aging of parts is an inevitable problem in the universe. Even if only robots maintain machinery, they will still age. Complex production lines will produce all kinds of bugs, which need to be handled by humans.

Therefore, after graduation, Wang Haifeng will join the excavation working group 009873, become a very accurate screw and devote his life.

Their future has been planned.

Everyone's eyes were a little dull, as if frozen, looking at the hot scene in this large industrial base.

"Everyone, after this class, you are about to graduate... Do you have any questions you want to ask?" The counselor in the university added.

She is an old man with gray hair. She is still struggling at work.

Four hundred years ago, the population of new human civilization expanded to 100 million.

The huge population has brought sufficient labor force, so that in 800 years, mankind has completed more than 80% of the planetary engine! For the remaining 600 years, only the remaining 20% needs to be completed.

However, with the passage of time, a large number of machines once purchased from the trading market began to depreciate, which was a difficult problem, so that the construction rate of planetary engines gradually slowed down.

In addition, in the original agreement with the interstellar exchange market, the curvature spacecraft in the future can only carry 40 million people at most.

Therefore, the government plans to slowly recover from the current 78 million to less than 40 million in the next 600 years.

In this way, the change of population structure will inevitably lead to aging.

"Teacher, can you change a job, a little more interesting job." Suddenly, a boy beside Wang Haifeng said. After he finished, many students trembled.

Although this construction site is spectacular, but... Do they stay here all their life?

"Of course, if you have enough professional knowledge, you can manufacture construction machinery. Many of our machinery will be eliminated in the future, and you can also go..."

"I mean, more interesting work."

"Interesting, what is an interesting job?"

"For example, singing, drawing comics, programming games and so on... You can choose your own job."

The counselor frowned, then smiled and said, "when the whole plan has not been implemented in the past, there are many interesting laboratories where you can do the work you like. But now, these laboratories have been banned. Unless your grades are excellent, you can engage in some scientific research work and complete what you like in your spare time. "

"After all, we ordinary people are fighting for the greatest cause in the world."

All the students were silent.

Suddenly, the boy said again, "the greatest cause in the world is to use hundreds of thousands of excavators to dig the basin bigger? Finally, scrape the surface of the whole planet for hundreds of meters? "

The boy's tone is very strange. It seems to be a kind of ridicule with a trace of helplessness.

"Ah, yes. This is the greatest cause. At the beginning, my teacher taught me the same. She dedicated her life in this way, and so did I. then, it's your turn. "

Unexpectedly, the counselor did not refute.

Maybe she thought so when she was young, but now she is old and will retire soon, and she doesn't go back to think about such complex things.

I've been here all my life. What else do you want?

The students were silent and didn't speak.

The next stop is the big ice hockey behind the ass of "Planetary Fortress". Everyone gets on the spaceship and goes to the big ice hockey numbered "js144" 200000 kilometers away.

The temperature of this ice hockey is lower. Below minus 250 degrees Celsius, the thick ice layer is harder than steel. At this temperature, all the gases form thick ice.

There are also some industrial bases above the ice hockey. Hydrogen fuel, oxygen, methane and various chemicals are being mined. These substances can be obtained as long as the ice is cut down by robots and purified simply.

Looking up, Wang Haifeng saw the trembling flame cutting through the dark starry sky, as if he could rush to their faces.

The colorful planet ahead is the Planetary Fortress they have tried their best to develop.

The violent plasma light is different due to different atomic nuclei. Copper ions are blue, iron ions are yellow, and manganese ions are pink. They re cool and condense here, forming a large black haze.

This planet chase war will last for at least 400 years. Either mankind will win completely, or two planets collide and fail completely, with no other results.

"Do you want to succeed or fail?"

Seeing this scene, everyone was silent. Even the angry boy looked at the planet full of colorful light and couldn't speak.

Some people thought of running away, fleeing the place and giving up the whole plan.

But they didn't dare say it. Those brilliant ionic flames seem to ignite the whole civilization. Whoever dares to escape is the sinner of history and civilization.

The greatest cause?

Who knows

Who can define greatness?

Do you think it's great to finish your own work and be a social screw all your life?

No one can answer.

……