Fig. 1. The Penrose diagram for the analytically extended Schwarzschild solution Fig. 2. Only the region of the Schwarzschild solution outside the collapsing body is relevant for a black hole formed by gravitational collapse. Inside the body the solution is completely different Fig. 3. The Penrose diagram of a spherically symmetric collapsing body producing a black hole. The vertical dotted line on the left represents the non-singular centre of the body Fig. 5. The Penrose diagram for a gravitational collapse followed by the slow evaporation and even- tual disappearance of the black hole, leaving empty space with no singularity at the origin
