What is "photon sails"

Usage examples of "photon sails".

Now they lived in the gaps between the stars, in city-sized ships whose sophistication varied enormously, from photon sails to engines theoretically impossible to human science.

The strange vehicle had huge, spun-gold photon sails, and a wooden body covered in elaborate and somewhat obscene carvings.

The photon sails were spreading, although most of the satellites spinning around the earth seemed to be broadcasting virtual shopping and porn.

In every arm of the galaxy were Outsiders, using everything from photon sails to reactionless, inertialess drives to push their ships.

In every, arm of the galaxy were Outsiders, using everything from photon sails to reactionless, inertialess drives to push their ships.