08-13-2016, 04:11 AM
(This post was last modified: 08-13-2016, 04:11 AM by iancampbell.)
IMHO (particularly given OA tech) making a planet is a much easier proposition than making one that's even vaguely habitable. Even if the material is cooled before delivery, heat would be generated via gravitational compression. And it would continue to leak out for a VERY long time; after 4 billion years, quite apart from radioactive heating there is still heat being generated by the slow crystallisation of the deepest part of the outer core.