how would he traverse the spaceways? swing along on an astoroid or other stuff flying though spsce? Line would attach to a compatible planet and pull him in? Better yet, rocket ("rocket" meaning power cosmicly) propelled billy clubs.
I would imagine Captain America would be asked to be one of the first to accept this "honor", but of course he would decline thinking it was to "cosmic" for him as he's more a down to earth type of hero.