Laying a air pipe for the moon

  In the future, mankind will build large settlements on the moon and on large artificial satellites orbiting the earth in order to develop precious resources in the moon and the universe. There are many people on these large-scale cosmic settlements, some even tens of millions. In addition to humans, many animals will also move to these large-scale cosmic settlements in the future to form another prosperous world!
  What use air transport
  , however, on the moon and large satellites, are not humans and animals most in need of substance – air. If a spacecraft is used to carry air from the earth to the moon, it will cost tens of thousands of yuan to carry 1 kilogram of air, which is not only expensive, but also cannot be continuously supplied in large quantities like tap water.
  How to do it? Scientists envisioned two schemes: one is to plant plants on the settlements of the universe, allowing the plants to photosynthesize to produce oxygen; the other is to lay a long air pipe to continuously transport the air from the earth to the settlements of the universe.
  You may question that the distance from the moon to the earth is 384,000 kilometers, not to mention that the pipe needs to traverse a vast cosmic space, that is, on the earth, this long pipe with a length of nearly 10 times around the earth’s equator needs to be laid. It’s easier said than done!
  Yes, this is indeed not an easy task. However, scientists came up with a magical idea. Instead of using solid materials to make this tube, scientists can use “light” to make this tube!
  Light air equipment
  laser – we all know this is a modern “SG”, it has the power, the direction of accurate, small divergence angle, is not affected by the Earth’s gravity and so on. In addition, it has a feature that people are not familiar with, that is, “impermeability”. In other words, a laser beam can form an invisible force during its propagation, making it impossible for ordinary gas to penetrate it! Scientists conceived the cosmic air tube from this newly discovered point.
  The laser light emitted by a general laser is a solid “line”. If a long cylindrical ruby ​​laser is used to emit the laser light, the laser light emitted from the output end of its annular section will be tubular. If you have paid attention to it, you will find that the water flowing out of the tap is always a “solid” stream. If you put a log smaller than the outlet in the center of the tap of the tap, the water It will spray out from around the log block and form a hollow “water pipe”! The wonderful “light pipe” is similar to its situation.
  In this kind of “light pipe”, the distribution of the beam is that the energy density at the center is the smallest, that is, the least photons; the closer to the circumference, the greater the energy density, that is, the more photons; when it reaches the circumference, the energy density will reach the maximum. The number of photons is the most and they are arranged in the tightest way, so that gas cannot penetrate from it. In this way, the “light wall” can “hold” gas just like a solid tube wall!
  How transport
  how “loaded” gas it? When the laser is turned on and the “light tube” is formed, the gas is injected from the center of the “light tube”. Since the photon is moving forward at a fast speed, the injected gas is “trapped” by the photon and rushes forward. , Which realizes the transportation of gas in the “light tube”.
  The transportation of gas in a “light pipe” is somewhat different from the transportation of liquid in a water pipe. When the liquid is transported in the water pipe, due to the friction between the water and the pipe wall, the energy is reduced while transporting, and the speed gradually slows down. This is where the water flow is faster and farther away from the water tower when the water pipe is closer to it. The reason for the slower water flow. When the gas is transported in the “light tube”, not only will the gas not lose energy and slow down due to friction with the “light wall”, but on the contrary, it will be more and more happy due to the contact with the “light wall”! This is because the “light wall” is different from the solid water pipe wall, which is composed of photons moving forward at high speed. As soon as it hits gas molecules, it will be transported forward at a faster speed. This is amazing!
  But according to the current level of laser technology, if a laser is used to actually transport gas to the moon, the diameter of this device will reach 89 meters. The diameter of the receiving device on the moon is twice as large as that on the earth, which is 178 meters. This is currently not an ideal standard for use.
  However, scientists predict that with the rapid advancement of laser technology, the launch device in the future can be reduced to only 25 meters in diameter, and the receiving device can be reduced to 50 meters. At that time, from the earth to the moon or from the earth to the settlements in the universe, it can be used to transport large amounts of air and oxygen!