You said it had artificial gravity, right? I guess since they're so advanced, it's some kind of gravity field like they use on ships, but you could also walk on the inner surface if it was spinning like a ring.
If it was just lying there, the gravity would just be toward the center, right? But that would be inconvenient if you dropped something down there.
: A long long time ago, yeah. But how else are you going to get a ship in or
: out of a hollow sphere containing an atmosphere? Any holes in the
: "ground" and all the air would go whooshing out (like the Eye
: Storm, for another Ringworld reference). There are smaller airlocks on the
: outside, and transporters and the like, but those are only useful for
: small things.
: Then again, I suppose that this thing WAS built by the Jjaro... they could
: fold whole planets around, why not beam a ship inside? But I don't want to
: shoot holes in my own story, so... These are more ancient Jjaro, they
: couldn't do that yet.
