Paper airplane exploring Mars

  What is on Mars? In the future, can human beings migrate to Mars? We are eager to know the answers to these questions. In order to get an early answer, in 2020, NASA will launch the Perseverance Mars rover. If it successfully lands on Mars, it will be the fourth American rover on the Martian surface.
  Rovers are the pioneers of human exploration of Mars, but they are not enough. Take the American Curiosity, which is currently exploring Mars, as an example. It can only travel 20 meters a day. When will it be possible for these vehicles to go? All over Mars? In this regard, NASA scientists have a new approach.
  ”Nano paper airplane” was born
  in nature, and every time the meal, groups of ants, a bee will be out in force around for food, he happily calls his companions later found to share. Inspired NASA scientists are also preparing to release a group of robot “bee colonies” on Mars to help the rover base camp explore Mars.
  Although the idea is good, it is not easy to implement, because the rover itself has a small capacity and it is difficult to load a large number of robots, and if the robots are too small, they cannot carry large energy sources to fly further. This is a dilemma. It was not until the emergence of “nano paper airplanes” that this problem was solved.
  Each of us must have played with paper airplanes when we were young. This is a toy that relies on wind to fly forward and can fly far without other energy. If the paper airplane can become the main force in exploring Mars, it will be able to solve the above problems, because it is very light and does not require additional energy. Of course, ordinary paper airplanes can’t work. After all, they are very soft and difficult to fly far. The “nano paper airplane” made by a team led by Igor Bagadin, a physicist at the University of Pennsylvania, may be able to take on this important task.
  ”Nano paper airplane” is made of a material called nano paperboard. The main material of nano-paperboard is aluminum oxide film. The thickness of a film is only tens of nanometers. When hundreds of films are stacked into a hollow board with a thickness of tens of microns, nano-paperboard is formed. Nano-paperboard intentionally leaves a sandwich structure with holes similar to corrugated paperboard during the stacking process, which helps to enhance its strength and hardness. According to calculations, the hardness of nano cardboard is 10,000 times that of solid cardboard of the same quality.
  Nano-paperboard has the advantages of light weight and great flexibility. A piece of cardboard of 1 square centimeter weighs less than 1 mg. Although the cardboard is very light, its load-bearing capacity is not weak, because it has strong elasticity. Even if the cardboard is bent more than 90°, it can still be restored to its original shape, so that it can carry some small devices such as cameras and sounders when performing Mars exploration missions.
  The “nano paper airplane” can fly farther than ordinary paper airplanes, because it can not only fly by the wind on Mars, but also has a second “wind” to help it. When sunlight is irradiated on nano cardboard, the cardboard will not be uniformly irradiated due to the different illumination angles. Nano cardboard is an excellent insulator, and the heat transfer speed on the cardboard is very slow. There are also differences in surface temperature everywhere. According to the law of thermodynamics, the higher the temperature, the faster the molecular motion, and vice versa, the slower the speed. The different molecular motion speeds will produce a flowing wind, so that the “nano paper airplane” gains new forward power.   The gravity of
  flying the “nano paper plane”
Mars is only 38% of the earth’s. This environment has brought great benefits to the “nano paper planes”, enabling them to carry detectors 10 times the weight of their own. However, because the “nano paper airplane” weighs only 1/3 milligram, the detector that can be carried is only a few milligrams in weight at most. The research team has installed a camera with its own light source on the “nano paper airplane” to complete the most basic shooting tasks. On this basis, the research team is also developing small chemical sensors to detect water and methane, these devices can allow scientists to quickly find life on Mars or potential human habitation.
  ”Nano paper airplane” still has a problem that needs to be solved, and that is how to recall it. In this regard, Bagadin plans to install a laser receiver on the “nano paper airplane” to control the heated area of ​​the “nano paper airplane” through the laser, so that the movement of the paper airplane can be adjusted by controlling the second “wind” Speed ​​and direction. In experiments conducted in the laboratory, Bagadin has been able to control the rise and fall of the paper airplane by changing its heated area.
  Such an easy-to-use Martian “paper airplane” may go to Mars with the “Perseverance” rover in the future, and become a Martian “guide”, flying in front of the “Perseverance”, collecting road information first, and guiding the rover to travel more smoothly . “Paper airplanes” may also become “indigenous peoples” of Mars, flying around the vast Mars, recording and studying the atmospheric and geological characteristics of Mars, helping us find the most suitable habitat