1) Interstellar travel 2) Japanese invention 3) Spacecraft propulsion
Found on
https://www.crosswordclues.com/clue/solar-sail
Solar sails (also called light sails or photon sails) are a form of spacecraft propulsion using the radiation pressure (also called solar pressure) from stars to push large ultra-thin mirrors to high speeds. Light sails could also be driven by energy beams to extend their range of operations, which is strictly beam sailing rather than solar sailin...
Found on
http://en.wikipedia.org/wiki/Solar_sail
A device that uses the pressure of sunlight (see radiation pressure) to propel a spacecraft in the same way that a sailing ship uses wind. It consists of a large but extremely thin sheet of strong, flexible material, such as Mylar film, and a rigid framework to keep it extended and to transmit its p...
Found on
http://www.daviddarling.info/encyclopedia/S/solar_sail.html
No exact match found.
