When we hear people talk about judgement we may hear phrases like “...burning in hell for all eternity.” It's wrong and physically impossible. Hell is temporary.
A gravitational singularity was established forever: it formed the foundation of the first heaven and earth; it will be the foundation of the new heaven and earth. It shall not be removed.
We (that's me and the Holy spirit) resolved the Holy Trinity with particle physics and we can now calculate the mass of the observable universe as a portion of the total mass of the universe.
The Millennial Kingdom is what the Old Testament prophets referred to as "a new heavens and a new Earth," but it's not the new heavens and new Earth that John describes in Revelation chapters 21-22.