Nasagov brings you the latest images videos and news from americas space agency get the latest updates on nasa missions watch nasa tv live and learn about our quest to reveal the unknown and benefit all humankind. Learn how solar sail technology works take an in depth look at the cosmos 1 mission and find out what solar sails mean for future space travel. A solar sail simply put is a spacecraft propelled by sunlight whereas a conventional rocket is propelled by the thrust produced by its internal engine burn a solar sail is pushed forward simply by light from the sun. A new method of space travel is about to get its moment in the sun several upcoming missions aim to harness the subtle push of sunlight using gossamer solar sails to cruise through the heavens
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