Lightsail, a project of The Planetary Society, will merge the ultra-light technology of nanosats with the ultra-large technology of solar sails setting a course to the stars. LightSail-1 is the beginning of an innovative program that will launch three separate spacecraft over the course of several years.
IKAROS (Interplanetary Kite-craft Accelerated by Radiation Of the Sun) is a solar sail which gathers sunlight as propulsion by means of a large sail. This solar powered sail craft will employ both photon propulsion and thin film solar power generation during its interplanetary cruise. IKAROS will be launched together with the Venus Climate Orbiter, 'Akatsuki' in fiscal 2010 by JAXA.