[He files away 'as close to a person as possible' for later, because...planets? He still has no idea what they actually are.]

The Three Realms in which I live--lived?--occupy similar geography, but layered, I'd suppose you'd say. Each one exists further into the Darkness than the last. Considering that, I would say no. No, I'm probably not from this Earth you speak of. But as I'm here in an entirely different world, do you simply mean...separate worlds?

Travelling too far from the center of our own is impossible, so I suppose it would be reasonable that beyond our reach there would be different ones.