Mitch began to have the soldiers transport the signal terminal to the gate of the cavern and began to transmit signals continuously, but after a few days, there was no response from inside.

"Captain, I think there must be no one inside, it's been a few days in a row, and no one responds, are we going to force the gate open?" Mickey found Fish Sen and said.

"Force on? What if they destroy what they want to protect? Let's wait a little longer and let the rice grains search for the various moon seas and see if they can find anything. By the way, the far side of the moon is full of craters and craters, which should be hit by other small stars, you know this better than me, you arrange for soldiers to go to the far side of the moon to take some samples. ”

"Okay captain."

Mickey and Miri are busy, and Lena is not idle, constantly observing other planets.

It wasn't long before Mickey came the good news that helium-3 had been discovered on the far side of the moon.

"Captain, there is a lot of helium-3 in the soil on the side of the moon facing away from the Earth, which can help us increase the power and speed of our current spacecraft."

"Helium-3 ? Isn't this gas? How can it be found in the soil on the far side of the moon? Yusen asked suspiciously.

"The helium-3 here comes from the solar wind of this galaxy, and if you look at the simulation of this galaxy, since the moon has no magnetic field, when the far side of the moon is facing the sun, the solar wind blows directly to the far side of the moon. There is no atmosphere on the far side of the moon, and the soil is particularly loose due to the impact of other small meteorites, so when the solar wind blows helium-3 into the soil on the far side of the moon, it will be surrounded by particles in the soil, and helium-3 remains in the soil on the far side of the moon, and because the helium-3 energy electron level is low, they will not enter the soil too deeply, and they are attached to the soil on the surface of the moon. Mickey said, pointing to the analog image.

"So how do you separate helium-3? Mickey"

"This star is about more than 100 degrees during the day, and if you want to separate helium-3, you need a temperature of more than 700 degrees, and the lunar soil has 70 kilograms of helium-3 per square kilometer, and if you want to get 1 kilogram of helium-3, you need to process about 200,000 tons of lunar soil, so we can only deal with it on this star, and we need to go back to Earth to do a large helium-3 separation machine to deal with it."

"Yes."

"Captain, then you see, should we return to Earth directly and come back after completing the separator, or will we continue to explore, and what about the gate of the Crystal Palace on our planet Karnal?"

"Crystal Palace will continue to transmit signals first, and we will return first, and then make plans."

"Yes, Captain."

That's when Lena called the captain.

"Captain, come to the observatory and see that this planet closest to the moon actually has a riverbed and buildings."

"Okay, Linna, I'll come over here."

After hearing this, Uyomori immediately rushed to the observatory with Mickey, and under the astronomical telescope, Uyomori also saw a planet Mars, there are a large number of riverbed phenomena on Mars, and there are buildings on the surface, and Uyomori is excited.

"Linna, is this really a building?"

"Yes, Captain."

Yusen happily hugged Lina and said, "I'll just say that this galaxy can't be without intelligent beings. ”

"Captain, captain." Lena motioned for Uomori to hug it too tightly.

"I'm sorry, I'm so excited." Yu Sen said a little embarrassed.

"By the way, Linna, we've got a surprise for you, Mickey, tell her, what did you find?"

"We found helium-3 on the far side of the moon, which can greatly increase the power of our current spacecraft, but it is difficult to separate, and we need to plan after we return to Earth."

Lina said disapprerovingly: "What's the surprise about this, the spaceship power, this galaxy must be better, but we are facing a lot of problems in front of us, how to open the crystal palace of the planet Karnal?" How can we find them? And who built this building on Mars? Are they other advanced creatures? Or are they the people of our planet Karnal? For now, I think it's time to get that straight. “

"It's not like we've thought about what you're saying, but don't forget what our ultimate goal is. It takes a lot of power to build the Nine Star Alignment Transmission Station, you see the distance of these nine stars, which is the closest to the moon, if we want to build these as soon as possible, we must improve our power, which will definitely be of great help to our flight, and it will also greatly shorten our flight time. Mitch smacked Lina.

"As for the Crystal Palace on the planet Karnal, at the moment I suggest that it is not destroyed, we don't know what is going on inside, what if there is any damage caused? The captain and I have just discussed, and we continue to send signals, wait for a response, and then go back to Earth to figure out how to turn it on. In addition, what you are talking about Mars, we can only know when we get to Mars, you know the distance of Mars better than me, if you don't improve the power, how can our spacecraft of this kind reach Mars smoothly, and how can we return to Earth smoothly? Mitch continued to scare Lina.

"What you say has its own reason, it is rare for us to meet the mark of our Karnal planet on this planet, and we have said before that this has been about 50,000 years, I hope they will survive like us, but we can't contact us at the moment, we can only start the current matter, since we now find out the situation of the moon, we will return to the earth first and make further plans, we must prepare for our long-term plans."

"I also agree with the captain that first of all, our motivation is not enough for us to travel to Mars and return, and secondly, we have to prepare for the Seven Stars program, the moon is the closest springboard to us, we now know the current situation of the moon, if you want to build a pyramid on the moon, it is quite difficult. Moreover, there is a large gap between the height of the lunar mountains, and it is not easy for us to excavate. Mitch said.

"The Moon Mountains are not suitable for building pyramids, what do you think about building pyramids on Earth and then transporting them to the Moon as a transmission station?"

"Captain, first of all, we have to solve the problem of power, the overall weight of a pyramid is about 5 million tons, and it is basically impossible to achieve it with the current power." Mitch replied.

"And what about building pyramids on the moon?"

"The difficulty factor is very high, first of all, there is no air on the moon, there is no labor, even if it uses machinery, it is difficult to build, and there are many problems."

"Well, we have to overcome a lot of problems, and we have to find a way to overcome all problems for the sake of the Nine Stars Project."

"Well, Captain, it's best to go back and communicate with Engineer Ryuzo to see if we can solve these problems."

"Gather all the personnel back to the spaceship, and prepare to return to Earth tomorrow."

"Well, I'll arrange it."

Yusen alone fell into deep thought, there are too many problems to be solved, how to refine helium-3 on the moon, how to build pyramids on the moon, and where are the markers of the planet Karnal? What kind of creatures are the buildings on Mars? Each problem made him feel difficult, but for the sake of Planet Karnal, he had no choice, he had to find a way to solve these problems and overcome them.