NASA to Launch World's Largest Solar Sail Next Year

Treehugger: A demonstration intended to show the viability of "propellant-free" space transport in the near future is planned for 2014, with the launch of the world's largest solar sail. NASA's Sunjammer will deploy a huge, ultra-thin solar sail once in space, and be able to use the pressure of sunlight on that sail to propel the device.

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