Here's something to consider: how is it that the recent particle recovery mission Stardust has captured particles that can be formed inside a planet at extreme heat and temperature but not by drifting dust? how can an asteroid that is too small to have any gravity differentiating show layers of material of definite composition?
Fair enough. I need to look at some sources and get back to you. I still don't see exploding planets. Where does the energy come from? However, I will call some folks I know on Stardust and see what is up.