Light = EM wave
Gravitation = EM wave
Shawyer's Engine works very good ( You only need made similar engine that will take gravitation Intensity )
NASA about Shawyer's Engine
http://ntrs.nasa.gov/search.jsp?R=20140006052
Marosz ( in 2012 I made in home test that is able explain WhY and How his Engine is working !!! )
EM wave is not mowing respect to Earth
Light is moving respect to point where started
http://www.scienceagogo.com/forum/ubbthreads.php?ubb=showflat&Number=52741#Post52741
I'm very open for disscusion !
we can made engine that will use Gravitation Signal from Stars !!
BR MAciej Marosz ( inventor and engineer - I'm very open for cooperation )
http://tesla4.blogspot.com