hi friends, i came across this piece of news... "Until 2010, no solar sails had been successfully used in space as primary propulsion systems. On 21 May 2010, the Japan Aerospace Exploration Agency (JAXA) launched the “IKAROS” (Interplanetary Kite-craft Accelerated by Radiation Of the Sun) spacecraft deployed the sail. " they were using solar sails! tapping solar wind energy for acceleration.. so for the past 2 months i am wondering if we can tap energy from solar wind.i thought high velocity charged particles zooming around the earth can be made to run turbines..but the impulse was too low to run a turbine...for the turbine to rotate heavier particles were required...then i thought about thermocouples. the solar particles have high energy, may be thermocouple's connected together in series can generate enough voltage and supplement the traditional solar energy. but the problem is how to get it to the earth? can anybody suggest more ideas ??? or is it a waste of time??