But before there were streetlamps and electric lights everywhere ... will fundamentally advance the technology of spaceflight. Solar sailing is elegant not only in concept but also in its efficiency.

The idea of using solar light to push a sail was initially mentioned by Jules ... project] whenever it comes out in two years, it’ll be three years after that, before the system is built, ...

NASA's technology-demonstrating Advanced Composite Solar Sail System (ACS3 ... which support its 860-square-foot (80-square-meter) light-catching sail. Those booms deployed successfully in ...