LightSail is a solar sail spacecraft developed by the Planetary Society to demonstrate the use of sunlight for propulsion in space. It uses large, reflective sails to capture photons from the Sun, which push the spacecraft forward. This innovative technology aims to explore new methods of space travel without relying on traditional fuel. The first successful test flight of LightSail occurred in 2019, showcasing its ability to navigate using solar pressure. The mission aims to gather data on solar sailing and inspire future interplanetary missions, potentially paving the way for more efficient exploration of our solar system.