This blog entry picks right up from this blog entry here. Over the weekend I began thinking again about Gary Gygax's B2 The Keep on the Borderlands & how it relates to back into the Grey's backstory. To whom do the caves of chaos belong?! And who would claim the humanoid chaos infected army?! A standing army waiting to moved into ACK's Barbarian Conquerors of Kanahu & Colonial Troopers Knight Hawks rpg campaign affair is interesting.
Disadvantages resulting from the nature of orbital mechanics would make the arrangement of the orbits of the swarm extremely complex. The simplest such arrangement is the Dyson ring, in which all such structures share the same orbit. More-complex patterns with more rings would intercept more of the star's output, but would result in some constructs eclipsing others periodically when their orbits overlap. Another potential problem is that the increasing loss of orbital stability when adding more elements increases the probability of orbital perturbations.
Such a cloud of collectors would alter the light emitted by the star system (see below). However, the disruption compared to a star's overall natural emitted spectrum would most likely be too small for Earth-based astronomers to observe"
What does any of this have to do with 'Secrets of The Nethercity'?! The city of Cyfaraun may have been an interstellar trade point in the ancient past thousands of years ago. And one of the bugs specialist leader castes the Khepri. The Greys came up into their own right at the point when the Elves were worshipping Chaos. The Chaos gods ascended into several worlds where the Greys had established colonial holdings causing conflict. The Khepri took full advantage of this conflict to establish themselves. The Khepri are the interstellar equivalent of cockroaches. They take advantage of races by making beach heads in many worlds.
The Cloud Giants are not entirely gone & occassionally mount full extermination crusades against the bugs. PC's have to be careful not to get caught up in the huge radiation or the interstellar WMD deployed during these crusades.
Skinnies have been moving into some of the bug's Dyson spheres. They've taken over manufacturing certain stellar products & using the engines to work on their own holdings.And there is evidence that the Terran empire itself controls several Dyson spheres & they have been trying to make deals for a Grey stellar engines or two.