1. The universe might then have re-expanded without going through a state of infinite density. 2. The work that Penrose and I did showed that they would continue to collapse until they reached a singularity of infinite density. 3. Would it collapse to infinite density? 4. In the beginning, according to this model, mass was compressed into a state of infinite density, an initial singularity. 5. A massive black hole is thought to be a point of such infinite density and gravitational strength that nothing can escape from its grasp. |