That makes sense. My napkin math says 3.2x larger radius would mean ~33x larger volume, so it's less than twice as dense as earth and pressures at the core wou

That makes sense. My napkin math says 3.2x larger radius would mean ~33x larger volume, so it's less than twice as dense as earth and pressures at the core would be much higher (57x?) so it seems feasible that it wouldn't have to be made of anything particularly unique at all.