For how an airframed hull would land on a vacuum planet, allow me to
suggest the obvious (although the actual details will vary because
no one wants a fusion stream passing through their ship):
the ship reverses its orientation and accelerates away from its landing
path. Since I assume that the craft is designed to handle foreward
accelleration (in orientating the acceleration couches, aligning the
contragravity fields), the only difficulty would be a slightly
ackward projectory (possibly taking several orbits to land) and the fact
that it will land with the cockpit undoubtedly pointing backward
(and thus had better have really good display systems). Oh, and I
suppose that the landing gear might have to be redesigned slightly
to accomodate the slightly different stresses involved.
- --Brad