Airport Meow

Chapter 465 Crater Mountain

In the random hands of Bei Haiyang's family, Orient Express-01 finally flew to the moon awkwardly; of course, in the switch from the earth-moon transfer orbit to the orbit around the moon, Bei Haiyang still took over the operation.

Su Xiaoxiao and the two little guys can either only fly in a straight line, or fly wildly, unable to point.

There is a concept that must be clarified. Many people think that since the moon revolves around the earth and rotates itself, isn't the side of the moon facing the earth changing all the time?

But the fact is that for humans on earth, the moon has a negative side!

This has something to do with the movement of the moon.The moon can be regarded as a rigid sphere, and its motion can be divided into two parts: the motion of the center of mass (revolution) and the rotation around the center of mass (rotation).

The hemisphere of the moon facing away from the earth is farther away from the earth, and the gravitational force of the earth is smaller than that of the hemisphere facing the earth, that is, the force on the back of the moon is different, that is, the moon is tidally locked by the gravitational force of the earth.

After tidal locking, when looking at the moon from the earth, you can only see a fixed side of the moon forever.Due to the Moon's libration, the edge of the Moon's disk sometimes shows a little sideways.Overall, 59 percent of the entire lunar surface is observable from Earth.

When humans on earth did not fully understand all this, there were countless myths to guess what was on the back of the moon?Are gods living on it?Or is there a big secret?
In fact, it is a pockmarked face that is more vicissitudes than the front.

After Orient Express-01 entered the near-moon orbit, it flew to the back of the moon under the control of Haiyang Bei, and when it gradually decreased its altitude, it searched for the position of Mendeleev crater.

On the star map on the back of the moon, there is a very complete distribution of terrain and terrain. If the back of the moon is compared to a large plate, the Mendeleev crater is almost in the center of the entire plate, and it is also the largest crater on the back of the moon.

The coordinates of the lunar surface are longitude 140.9°E, latitude 5.7°N, and diameter 313 kilometers.

In its 2 o'clock direction is Zu Chongzhi Crater, 150 kilometers away; in its 11 o'clock direction, 3 kilometers away is Zhangheng Crater.

This is a crater named after astrologers from the Hua country, and there are many geological structures named after scientists from other countries around it. The basic principle is whoever discovers it first gets the name.

After entering the [-]-kilometer orbit on the lunar surface, Bei Haiyang reconfirmed through the communicator on his wrist,
"I need more accurate coordinates! A crater with a diameter of 3 kilometers, where exactly do you want to land?"

Francois replied, "Pay attention to the 8 o'clock direction of Mendeleev crater, there is a Pasteur crater, have you found it?"

Bei Haiyang quickly confirmed, "The one more than 4 kilometers away?"

Francois, "Yes, on the line connecting Mendeleev crater and Pasteur crater, the area 50 kilometers away from Mendeleev crater, we hope to do low-altitude hovering in this area."

Bei Haiyang was straightforward, "Please define the concept of low altitude accurately! If you want to see a rock the size of a blue ball clearly, we have to descend to a height below 300 meters; if you want to see a spaceship clearly, an altitude of [-] meters is more appropriate. "

Francois sighed, "You still guessed..."

Bei Haiyang was speechless, "I still can't guess it now, do you think I'm a fool?"

Francois' voice, "Let's go to the altitude of [-] meters. Sorry, there are some things I can't tell you in advance."

Bei Haiyang lowered the nose of the plane and landed towards the middle of the kilometer, but he did not immediately fly towards the Mendeleev crater, but made a slight circle.

"Because I have to adapt to temperature changes, it will take me three days to reach my destination, and the effective observation time over the Mendeleev Ring will not exceed four days."

Francois, "Understood, four days is enough, you are the captain, you decide."

To find traces of a spaceship on the lunar surface, of course, you can only look for it in the daytime. If it is night, you can use searchlights to search for traces, and the efficiency can be imagined.The time window for this roaming is exactly when the moon is back in daytime and the moon is in the dark at night, which is exactly the opposite of his first time on the moon. It is also designed by the space complex to give passengers a different experience.

The day-to-night conversion time on the moon is 14 days, that is to say, the entire night or day will last for 14 days. For searching, such a time window is relatively sufficient.

Flying directly to Mendeleev Crater, Bei Haiyang can reach it in an hour, but he can't do this because he must consider the impact of temperature differences on the space airliner and the huge pressure on the body's constant temperature system due to sudden temperature rises.

The temperature in space is below minus 200 degrees, and in the daytime on the back of the moon, the temperature of the lunar surface can reach more than 3 degrees. The temperature difference of nearly [-] degrees is not a joke. In space, the body’s constant temperature system works by heating. However, the lunar surface has to be cooled, and the two completely different temperature control methods require a process to switch.

The last time Bei Haiyang landed on the moon, he cleverly kept the Orient Express at the dusk line and kept the outside temperature constant. This was the most worry-free and safest way, but this time it was impossible because there was a destination that he had to go to. Fly the dusk line again like last time.

The reason why he said that it takes 3 days to reach Mendeleev crater actually means to avoid the highest temperature window under direct sunlight on the crater. , make the most of the last period of daylight before dark,
The advantage is that the temperature will not reach the terrible Baidu, at most it is in a high temperature of 6 to 70 degrees, which is still bearable for the body parts.

The mission is someone else's, but the plane is his. These details often determine the success or failure of a moon landing.

It is still a bit difficult for the current human civilization on earth to manufacture a space shuttle that can fly at a temperature difference of hundreds of degrees.

"We slowly adapt to the temperature difference, let the various parts of the body slowly adjust the structural stress, and avoid thermal expansion and contraction under extreme conditions. It’s a modified civilian airliner in the atmosphere, and they actually use this thing for spaceflight, that’s what worries me the most.”

Su Xiaoxiao realized something, "It's really a problem, it can't be reflected now, but it will appear after re-entering the atmosphere, and in the atmosphere, even the parachute system can't guarantee the absolute safety of passengers?"

Bei Haiyang nodded, "That's it! It's not just me who is worried, but all space pilots are worried!
No one would have thought that the biggest potential danger of space flight is not the power, but the temperature difference!

The consortium has been working hard in this regard, choosing parts with better temperature adaptability, but this is only a temporary solution, and unless the overall design is redesigned, it will never be the fact that it is a civil aviation airliner. "

(End of this chapter)