Is it possible that the asteroid belt represents the breakup of such a crust in the orbit of Jupiter and that the core then dropped down to form the planet of Venus which clearly has a cooling crust which is unique to our solar system? We are certainly operating toward stability limits around Jupiter and hte implied math could work.. This is an alternative explanation for Venus that is much easier than Jupiter successfully ejecting any matter. once you start thinking with this protocol, a lot of nifty outcomes are then plausible. again the evidence at hand supports is and such a break up would leave the crust mostly behind while venus would seek a new natural and stable orbit. this is kepler's observation as well on proportions. Understand that long before we had nuclear physics, scholars only understood the possibility of a molten surface from what they knew. It was an obvious problem, but nuclear only solved the energetics problem. Just as the Big Bang converted nuclear i