Some artifact cards and some Agents allow player to Place and "Unknown System".
Example Agent card
Explorer "Place an unknown system anywhere in the galaxy it has to touch 2 systems (discard after use").
But every system have on his revers clarification of type:
Uninhabited systems (normal)
Inhabited systems (normal)
Hostile systems (normal)
so player may choose which type of system he will add? Or he must choose randomly?
Ps. I'm sorry to ask so much today but on Thursday I'm doing a small demonstration of game. Today I finished making the prototype, and now I examines the rules