Solar sail

Force on a sail results from reflecting the photon flux

NASA illustration of the unlit side of a half-kilometre solar sail, showing the struts stretching the sail.

Solar sails (also called light sails or photon sails) are a form of spacecraft propulsion which uses large mirrors, driven by radiation pressure exerted by sunlight. A useful analogy may be a sailing boat; the light exerting a force on the mirrors is akin to a sail being blown by the wind. High-energy laser beams could be used as an alternative light source to exert much greater force than would be possible using sunlight, a concept known as beam sailing.

单词	Sunsail
释义	Sunsail 英语百科 Solar sail Solar sails (also called light sails or photon sails) are a form of spacecraft propulsion which uses large mirrors, driven by radiation pressure exerted by sunlight. A useful analogy may be a sailing boat; the light exerting a force on the mirrors is akin to a sail being blown by the wind. High-energy laser beams could be used as an alternative light source to exert much greater force than would be possible using sunlight, a concept known as beam sailing.
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Sunsail

Solar sail