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While the debate around the impact of LED lights is going on in the USA and elsewhere, the scientists of the two research groups led by Prof. Wu and Prof. Wang from the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (TIPC, CAS) together with Prof. Jiang from the City University of Hong Kong (CityU) have collaboratively developed a green light LED, in which the brightness and stability issue, which is the stumbling block for the green emission LED, have been well overcome by the prepared perovskite nanocrystal LEDs.
Why wood could outperform metal in orbit
Traditional satellites are usually made of aluminum and other metals. When such satellites burn up during atmospheric re, entry, they emit aluminum oxide particles that can stay in the upper atmosphere and potentially impact both the environment and space conditions.
The experiment satellite LignoSattests the hypothesis that wood can be a material alternative. Scientists hold that timber reacts differently in space than it does on Earth: because there is no oxygen or microorganisms, it does not burn or rot easily, thus it could be stable enough in orbit.
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Wooden satellites, if viable, might burn up more thoroughly when re, entering the atmosphere and thus give off fewer pollutants, which in turn is less harmful to the environment over the long term.
Engineering approach behind the LignoSat project
The satellite is a small CubeSat made of magnolia wood panels which were chosen after very thorough experiments in environment simulating conditions. Before, scientists had taken several wood samples to the extreme environment of the International Space Station (ISS) to find out the most durable species for the construction
Onboard the spacecraft sensors continuously measure
Stress and deformation of the structure
Changes in temperature
Radiation exposure
Influence on the functioning of onboard electronics
The main purpose of these data is to evaluate the capacity of wood to resist extreme orbital conditions, and thus be a viable material for the next generation of satellites.
Sustainability implications for the global space economy
The timing is very important for this project. A lot of commercial constellations, Earth observation programs, and next, generation communications networks have all led to an increase in satellite launches. Such a rise in the number of launches entails exacerbating the problem of space debris and environmental impact of more frequent re, entries.
Support greener spacecraft manufacturing supply chains
A biodegradable satellite structure might
Decrease pollution in the atmosphere due to spacecraft burn up
Mitigate orbital debris problems in the long run
Help create a new industry collaboration which cuts across aerospace and sustainable materials sectors
Besides, researchers believe that in the long run wood, based materials might play a role in space habitats or infrastructure provided that issues of durability and safety are solved.
A signal of broader innovation beyond software-led space tech
Despite AI, robotics, and automation being at the core of space exploration nowadays, this project sets a new direction by showing that materials science breakthrough is becoming equally vital.
The wooden satellite experiment thus reveals that next significantly better space tech inventions will not only be backed by smart coded algorithms but they will also be about the spacecraft physical components which are made of new innovative materials.
To aerospace suppliers, materials engineers, and sustainability, oriented investors, the LignoSat project is a pioneer demonstration that might dictate future satellite design methods over the next ten years.
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