135K views · 2.2K shares | Embarking on its first test flight in May 2015, #LightSail will perform critical function tests in preparation for its 2016 flight to demonstrate the viability of solar sailing for CubeSats (tiny, low-cost satellites). LightSail is completely funded by private citizens like you. (Music by General Fuzz - generalfuzz.com) | The Planetary Society | Facebook