Japan is preparing to launch the world’s first wooden satellite this year, a pioneering project aimed at reducing space pollution caused by conventional metal satellites.

The satellite, named LignoSat, has been developed through a collaboration between Kyoto University researchers and Sumitomo Forestry. Made primarily from magnolia wood, the small satellite is designed to test whether biodegradable materials can serve as viable alternatives to metals in space technology.

Addressing the growing problem of space debris

One of the project’s central motivations is environmental. Traditional satellites, when re-entering Earth’s atmosphere, burn up and release fine aluminum oxide (alumina) particles. Scientists have warned that these microscopic particles can remain suspended in the upper atmosphere for extended periods, potentially affecting atmospheric chemistry and environmental balance.

Japanese astronaut and aerospace engineer Takao Doi has previously highlighted concerns about such particles accumulating in the atmosphere over time.

By contrast, a wooden satellite is expected to burn up more cleanly upon re-entry, potentially reducing the long-term environmental footprint of satellite missions.

Can wood survive space?

At first glance, using wood in space may appear unconventional. However, project leader Koji Murata explained that the concept is based on scientific research rather than symbolism.

Studies published in the journal Earth, Atmospheric and Planetary Sciences indicate that certain types of wood can withstand harsh space conditions without significant structural degradation. Wood samples exposed to the space environment aboard the International Space Station for nearly a year reportedly showed no major deterioration.

Researchers attribute this resilience to the absence of oxygen and living organisms in space—two primary causes of wood decay on Earth.

Traditional craftsmanship meets modern space technology

According to information shared by NASA, the final design of LignoSat incorporates 10-centimeter honoki magnolia panels assembled using traditional Japanese woodworking techniques. This approach merges advanced aerospace engineering with centuries-old craftsmanship.

Once launched, LignoSat will be subjected to extreme temperature variations, vacuum conditions and radiation exposure. One of its key missions is to measure structural deformation and assess how wooden materials behave under prolonged orbital stress.

Murata noted that while wood can be stable and durable along one grain direction, it may be susceptible to dimensional changes or cracking along another. The satellite will collect data to evaluate these characteristics in orbit.

Toward sustainable space exploration?

If successful, the LignoSat initiative could open the door to wider use of biodegradable materials in satellite production. As the number of satellites in orbit increases rapidly, concerns over space debris and atmospheric contamination continue to grow.

Japan’s wooden satellite project signals an attempt to reconcile technological advancement with environmental responsibility — potentially marking the beginning of a more sustainable era in space exploration. (ILKHA)