True. It also has a little to do with whether or not the planet is liquid or solid core, yes? Of course, we don't even REALLY know if Earth has a liquid or solid core and so don't know precisely if there is any sort of standard for planet guts in general.
But as has been shown time and again, if you try to apply too much real science to Galactica, you either end up re-writing the script OR re-writing the laws of physics!
-Gordon
