We’ve looked at the problem of orbiting space junk before and the threat it poses to the future of space exploration and the use of satellites. Now scientists have devised a miniature “nanosatellite” fitted with a “solar sail” that can be used on satellites or upper stage launch vehicles. Once the equipment that has reached the end of its mission, the solar sails can be deployed to successfully achieve de-orbit. While it won’t cut the amount of debris already whizzing around above our heads, it will help stop future missions adding to the problem.
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