- A privately funded space advocacy group has deployed a “solar sail” in orbit. Such spacecraft could open up cheap space travel and provide ways to drag space debris out of orbit. LightSail uses no fuel. Instead it relies on a large reflective sail to capture the momentum inherent in sunlight. http://www.theguardian.com/science/2015/jun/11/spacewatch-lightsail-deploys-solar-sail 6 comments worldnews
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