Under the random hands of Bei Haiyang and his family, Orient Express-01 finally flew awkwardly to the moon; of course, during the switch from the Earth-Moon transfer orbit to the lunar orbit, Bei Haiyang took over the operation.
Su Xiaoxiao and the two little guys can either only fly in a straight line, or they fly randomly and cannot point.
There is a concept that must be clarified. Many people think that since the moon revolves around the earth and also rotates on its own axis, doesn't the side of the moon facing the earth change all the time?
But the fact is that for humans on earth, the moon has its opposite side!
This is related to the movement of the moon. The moon can be regarded as a rigid sphere, and its movement can be divided into two parts: the movement 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 further away from the earth and receives less gravity from the earth than the hemisphere facing the earth. That is, the forces on the moon's front and back are different, that is, the moon is tidally locked by the earth's gravity.
After tidal locking, when looking at the moon from the earth, you can always only see a fixed side of the moon. Due to the moon's balance movement, the edge of the moon disk sometimes reveals a little side. Generally speaking, the entire side of the moon can be observed from the earth.
59% of the moon's surface.
Before humans on Earth fully understood all of this, there were countless myths about what was on the back side of the moon? Are gods living on it? Or does it contain a huge secret?
In fact, it is a pockmarked face that is more weathered than the front.
After Orient Express-01 entered the near-lunar orbit, it flew toward the far side of the moon under the control of Haiyang Bei, and while gradually lowering its altitude, it searched for the location of the Mendeleev crater.
On the star map of the far side of the moon, there is a very complete topographic distribution. If the far side of the moon is compared to a large plate, the Mendeleev crater is almost in the center of the entire plate. It is also the largest crater on the far side of the moon.
Moon surface coordinates, longitude 140.9°E, latitude 5.7°N, diameter 313 kilometers.
At its 2 o'clock direction is the Zu Chong crater, 150 kilometers away; at its 11 o'clock direction, 300 kilometers away is the Zhangheng crater.
This is a crater named after a Tianwen scientist from the Hua Kingdom. There are many geological structures named after scientists from other countries around it. The basic principle is whoever discovers it first gets named.
After entering the 100-kilometer orbit of the moon, Bei Haiyang confirmed again through the communicator on his wrist.
"I need more accurate coordinates! A crater with a diameter of 300 kilometers, where do you want to land?"
Francois replied, "Look at the Pasteur crater at the 8 o'clock direction of the Mendeleev crater. Have you found it?"
Bei Haiyang quickly determined, "The one more than 400 kilometers away?"
Francois, "Yes, on the line connecting the Mendeleev Crater and the Pasteur Crater, in an area 50 kilometers away from the 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 clearly a stone the size of a blue ball, we have to descend below three hundred meters; if you want to see a spaceship clearly, a thousand meters height is more appropriate."
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Francois sighed, "You still guessed it..."
Bei Haiyang was speechless, "I haven't guessed yet. Do you think I'm a fool?"
Francois's voice said, "Then let's go to an altitude of one thousand meters. Sorry, there are some things I cannot tell you in advance."
Bei Haiyang lowered the nose of the plane and landed a thousand meters into the air. However, 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 the destination, and the effective observation time above the Mendeleev Ring will not exceed four days."
Francois, "Understand, four days is enough. You are the captain and you make the decision."
If you want to search for traces of a spacecraft on the moon, of course you can only do it during the day. If you rely on searchlights to search at night, the efficiency can be imagined. The time window for this roaming is exactly when it is day on the back of the moon and night on the front of the moon. Contrary to his first trip to the moon, it was also designed by the space complex to give passengers a different experience.
The day-night transition time on the moon is 14 days, which means that the entire night or day will last for 14 days. For search, this time window is relatively sufficient.
Bei Haiyang could fly directly to Mendeleev Crater in one hour, but he couldn't do this because he had to consider the impact of temperature differences on the space airliner and the huge pressure on the body's constant temperature system from sudden temperature rises.
The temperature in space is below minus 200 degrees, but during the day on the far side of the moon, the lunar surface temperature can reach over 100 degrees. The temperature difference of nearly 3 hundred degrees is no joke. In space, the body's constant temperature system works by heating, and when it comes to But for the moon surface to become refrigerated, the two completely different temperature control methods require a process to convert.
The last time he landed on the moon, Bei Haiyang's method was to cleverly keep the Orient Express at the dusk line and maintain a constant temperature outside. This was the most worry-free and safest method, but this time because he had a destination he had to go to, it was impossible. Fly the dusk line again like last time.
The reason why he said it takes 3 days to reach Mendeleev Crater, in fact, what he really means is to avoid the highest temperature window under direct sunlight on the crater. In a layman's terms, avoid the scorching heat at noon and choose to arrive before dusk. , try to make full use of the last daylight time before dark,
The advantage is that the temperature will not reach the terrifying 100 degrees. At most, it will be in a high temperature of 6 or 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 expedition.
It is still a bit difficult for the current human civilization on earth to build a space shuttle that can fly in high and low temperature differences of more than hundreds of degrees.
"We slowly adapt to the temperature difference, allowing each component of the body to slowly adjust its structural stress to avoid thermal expansion and contraction under extreme conditions. This is the biggest hurdle for future space navigation; you have to know, this special thing is actually It's just a modified civilian airliner in the atmosphere, and they actually use this thing for space flight. This is what worries me the most."
If Su Xiaoxiao realized something, "There is something wrong. It won't show up now, but it will show up after re-entering the atmosphere. In the atmosphere, even the parachute system cannot guarantee the absolute safety of passengers?"
Bei Haiyang nodded, "That's it! I'm not worried about this alone, but all space pilots are worried about it!"
No one would have thought that the biggest potential danger in space flights is not the power, but the temperature difference!
The consortium has been working hard in this regard and selecting parts with better temperature adaptability, but this is only a temporary solution rather than a permanent solution. Unless the entire aircraft is redesigned, the fact that it is a civil aviation aircraft will never be known."