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 [vid] Venus Climate Orbiter, 'Akatsuki' in fiscal 2010 by JAXA.