"George Kinley" wrote in message ...
Are there any way for rockets to fly in space , other then throwing mass
out in one direction and moving in other

No. All the laws of physics forbid a reactionless system, ie there is
*always* some reaction mass. But there are reaction based propulsion
that give the same kinda results. Solar sails are my choice and we
don't need nano anything to make useful spacecraft.

Greg