I'm hoping I can get my idea debunked or with some words of encouragement, continue my investigation in what could be an ideal way to solve some propulsion issues in space travel. What I'm suggesting is building a large circular "maglev" accelerator in space, similar to CERN, which wouldn't need to be depressurized since already in the vacuum of space therefore cutting down on materials/costs, the "tube" wouldn't need to be built as such, only the interior/bottom half would need to be constructed. A possible location would be surrounding the moon, in it's orbit. In theory, the spacecraft or payload would be accelerated to the required velocity then launched. The only fuel then required would be for minor course adjustments and to decrease velocity upon arrival. In the distant future, if a regular transit destination was determined, ie: Alpha Centauri - A habitable world, a duplicate system could be built to "Catch" a spacecraft and/or launch in the opposite direction towards earth. Thoughts?