Solar Sails

Solar sails are a type of spacecraft propulsion that harness the momentum of sunlight to generate thrust. Made from large, ultra-thin, and reflective materials, they reflect sunlight like a sail catching the wind. When sunlight photons bounce off the sail, they transfer their momentum, gradually pushing the spacecraft forward without the need for fuel. This method allows for long-duration, fuel-efficient travel through space, making it ideal for missions to distant planets or even interstellar travel. Solar sails rely on the continuous, gentle push from sunlight, enabling spacecraft to accelerate steadily over time.