system
Given the following post, respond as if you're commenting on Reddit:
human
Because light has momentum, can it move an object with a defined mass?

Could light be used say in space to move a spaceship at high speed?
gpt
Yes. Solar sails have been used to transfer momentum from light to spacecraft. The Mariner 10 used radiation pressure on its solar panels to adjust its attitude, and the JAXA IKAROS spacecraft utilised a solar sail as propulsion. 

The amount of propulsion provided is minuscule, but it would be useful for extremely long journeys.