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Japan to build wooden satellites to cut space junk
By Justin Harper
Business reporter, BBC News
- Published
image copyrightSUMITOMO FORESTRY A major Japanese company and Kyoto University have joined forces to build what they hope will be the world's first satellites made out of wood.
Sumitomo Forestry said it has started research on tree growth and the use of wood materials in space.
The partnership will begin experimenting with different types of wood in extreme environments on Earth.
Space junk is becoming an increasing problem as more satellites are launched into the atmosphere.
Wooden satellites would burn up completely without releasing harmful substances into the atmosphere or raining debris on the ground when they plunge back to Earth.
"We are very concerned with the fact that all the satellites which re-enter the Earth's atmosphere burn and create tiny alumina particles which will float in the upper atmosphere for many years," Takao Doi, a professor at Kyoto University and Japanese astronaut, told the BBC.
"Eventually it will affect the environment of the Earth."
"The next stage will be developing the engineering model of the satellite, then we will manufacture the flight model," Professor Doi added.
As an astronaut he visited the International Space Station in March 2008.
During this mission, he became the first person to throw a boomerang in space that had been specifically designed for use in microgravity.
Sumitomo Forestry, part of the Sumitomo Group, which was founded more than 400 years ago, said it would work on developing wooden materials highly resistant to temperature changes and sunlight.
The wood it is using is an "R&D secret" a spokesman for the company told the BBC.
Space junk
Experts have warned of the increasing threat of space junk falling to Earth, as more spacecraft and satellites are launched.
Satellites are increasingly being used for communication, navigation and weather forecasting. Space experts and researchers have been investigating different options to remove and reduce the space junk.
image copyrightGetty ImagesSpace junk travels at an incredibly fast speed of more than 22,300 mph, so can have cause considerable damage to any objects it hits.
In 2006 a tiny piece of space junk collided with the International Space Station, taking a chip out of the heavily reinforced window.