Originally shared by David Brin

See a cool video about the Planetary Society’s Project Light sail, that will expand from a mere bread loaf cube-sat to 32 square meters and launch humanity (at last!) into the era of interplanetary sailing.

http://www.planetary.org/multimedia/video/scitech/lightsail-2-animation.html

http://www.planetary.org/multimedia/video/scitech/lightsail-2-animation.html