Timber in Orbit: Japan's Wooden Satellite Prepares for 2024 Launch

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In a daring move, researchers from Kyoto University and Sumitomo Forestry are planning to launch a wooden satellite into orbit by 2024.

The LignoSat Space Wood Project plans to send a wooden satellite into Low Earth Orbit (LEO) by 2024

This innovative project, known as the LignoSat Space Wood Project, started in April 2020. Their goal is simple but ambitious: they want to see if wood can survive the harsh conditions of Low Earth Orbit (LEO), a challenge usually faced by metal-based satellites. This exciting work could change the future of space technology, making it more sustainable.

“The experiment’s results astoundingly proved the resilience of wood under simulated LEO conditions,” announced Koji Murata, the spearhead of the space-wood research initiative, in a 2021 statement. Murata’s intention was to delve into the impacts of the harsh LEO environment on organic materials.

To facilitate this experiment, a panel carrying three different wood samples was sent to the International Space Station (ISS). The panel found its temporary home in the Japanese Experimental Kibo Module on the station, enduring the vacuum of space for a full ten months during 2022.

After this comprehensive exposure, Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata oversaw the successful retrieval of the wood panel, which was then transported back to Earth aboard SpaceX’s CRS-26 cargo Dragon spacecraft in January 2023. The subsequent analysis conducted by Kyoto University researchers authenticated wood’s extraordinary durability in space, with the study reporting “no decomposition or deformations, such as cracking, warping, peeling, or surface damage,” in the face of extreme exposure.

The compelling findings led the researchers to select wood from Magnolia trees for the next phase of the LignoSat project, due to its “relatively high workability, dimensional stability and overall strength,” according to the team’s press release.

Space debris in orbitThe transformative discovery heralds numerous opportunities, especially when considering the environmental advantages wooden satellites could hold over traditional metal-based ones. Not only does wood offer a cost-effective and cleaner production process, but it also provides an environmentally conscious solution to the prevalent issue of space debris disposal.

In general, most deorbiting satellites incinerate in Earth’s atmosphere, with the remaining fragments deliberately directed to descend into remote oceanic regions. However, wooden satellites are anticipated to completely combust upon reentry into Earth’s atmosphere. Even in the highly improbable event of any fragments surviving this descent, these organic materials would naturally decompose, eliminating the risk of hazardous debris.

Geared up for its extraordinary next move, the LignoSat project is all set to propel the world’s first wooden satellite into orbit next year. This pioneering effort is the fruit of a collaborative endeavor between NASA and JAXA. It stands as a landmark moment, heralding a new chapter in the story of satellite manufacturing technology.

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