Yes drsam. I agree void is not empty and if energy is being converted into mass, something is being converted into energy. My postulation is that energy is an intermediate stage of conversion of non physical entity into physical entity (like prion & viruses represent the intermediate stage of living & nonliving entities). The reason I wouldn't accept model of a static or pulsating universe is because universe is not only expanding but it is accelerating outwards. there can be only two explanations for that.