Starship's idea of (1) you send the fuel up in another Starship and (2) you refuel by bumping uglies and then accelerating in a direction that makes the fuel si

Starship's idea of (1) you send the fuel up in another Starship and (2) you refuel by bumping uglies and then accelerating in a direction that makes the fuel simply fall into the empty vehicle, together solves a lot of problems that imply a static depot.