Dear sirs and madams: I recently wrote a paper that concerns itself with how, if two space-craft were to use each other as reaction mass, the need for propellant between them would increase quadratically with desired speed and not exponentially. Sadly, the journal to which I sent said paper rejected it. Does anyone know which journal one should send this paper to? Also, while we're at it, peer review would be much appreciated. Thank you all for your time in advance.