[ his mouth tics down into a small, thoughtful frown. "space between all worlds" sounds suspiciously nexus-like, which he really doesn't like the sound of, and also.. there could be a problem with that if there are no suns within reachable distance. ]

So.. if we, for instance, need solar radiation..? [ he won't die, probably. he's spent years without it before. he just doesn't like the idea of going without his abilities for long stretches of time. he doesn't like feeling helpless.

a pause, and he shakes his head. ] I'm sorry, that's not really your problem to solve. [ he offers out a hand, polite, a little sheepish. ] I'm Superman. Or just.. Jon. [ hiding his identity here when it's already out at home seems pointless. his family isn't here, and he seems expected to use his abilities regularly here anyway. ]