Once Again you convince me to think about it more. So scratch the other two suggestions. What about a space carrier for ferrying missions to and from planets and for scientific research of the planets. It would be like the demilitarized version of an aircraft carrier. It would probably need a new launchpad for VTOL takeoffs for ships that transition from vertical flight on intal takeoff to horizontal flight, like a Venator in Star Wars: Revenge of the Sith.