Japan plans a 2023 launch of the world’s first satellite made out of wood. Wooden satellites would burn up 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. "The next stage will be developing the engineering model of the satellite, then we will manufacture the flight model," Professor Doi added. 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. 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, television, navigation and weather forecasting. Space experts and researchers have been investigating different options […]

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