is to possible to construct a superconducting coil in space, with a current induced in it. then one could maybe have a spaceship or probe with its own loop, but with a current in the opposite direction. the resulting opposing magnetic fields would, presumably, provide a means of launching a probe or manned vehicle into space and so save some on fuel costs. i read about someone suggesting a ramjet. is that what i was describing? i guess it would work better on a lunar base than, say from a space station, as the space station would still have to burn fuel to counteract the momentum. or maybe it could be launched alternatively in opposite directions of the station's orbit, only causing the orbit to change.
ps: be brutal with the poll, i can take it!