Incidentally, I have a story called "The Scale-Tree" coming out in Beneath Ceaseless Skies sometime in the not-so-distant future, which will provide interested readers a glimpse into the topological-mythological underpinnings of the counter-earth at the cosmic antipodes.
It's kind of strange, really, but I get the feeling sometimes that I'm exploring a world that's already there, rather than inventing a new one of my own. It's a bit like mathematics, which is accomplished much more by fiat than people suspect. The mathematician says, Let it be so!, and it is so, and he or she goes down into the world that he or she has made and explores it. That's how I feel about Antellus. Its axioms established, it developed on its own, down to the least detail. Fortunately, as Gödel's incompleteness theorems have established, I still have infinitely many avenues of freedom open to me. Or something like that.