An anonymous reader writes: Earlier this year the Japanese space agency successfully deployed and used a solar sail to propel its spacecraft Ikaros, and now NASA announced plans this week for its own solar sail mission. This fall it will launch the NanoSail-D into orbit 400 miles up with a Minotaur IV rocket. Once deployed, it will orbit for 17 weeks, proving the technology and allowing astronomers to snap lots of photos.
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