[posterboy]

> at absolute zero, the electrons do not 'fall into the core'--

well, actually I think nobody has shown this empirically. To add to my point, I don't think there can't be any closed system but one and it seems reasonable to assume that any substem could be at zero only if all are. Maybe energy just cant retrivably convert to other forms and loose all heat in the process when it's environment is already at rest. At best you could maybe get singularities before the environment exited by the process feeds heat back into the subsystem. Anything else would be as good as a papetuum mobile which you'd need to cool down this far.