On 11/10/2011 11:23 AM, Dan'l Danehy-Oakes wrote: > I don't think Green can be Urth's past, because that would put Blue > somewhere in the Solar System's past, and I don't think that works. What if Blue is Verthandi and it has over time moved to a more distant orbit? Perhaps Wolfe is taking the "Capture Moon" theory for the existence of Lune?