I&#x27;ve read all of those! (I actually discovered Karl Schroeder from your blog; for which I thank you. I gather _Lockstep_ addresses the same subject, but haven&#x27;t read it yet.) Although they&#x27;re very much focused on going substellar objects, e.g. brown dwarves or dark giants, while I&#x27;m thinking of the vastly more common asteroidal bodies. It&#x27;s not a subject I&#x27;ve seen addressed very often.<p>Here&#x27;s the paper that crystallised the idea for me:<p><a href="http:&#x2F;&#x2F;arxiv.org&#x2F;pdf&#x2F;1201.2687v1.pdf" rel="nofollow">http:&#x2F;&#x2F;arxiv.org&#x2F;pdf&#x2F;1201.2687v1.pdf</a><p>Also, yes, fiction --- I&#x27;m not enough of a scholar for non-fic.