![](c12_fig13.jpg)
Figure 12-13 The Structure of a Nonrotating (Schwarzschild) Black Hole A nonrotating black hole has only two parts: a singularity, where all of the mass is located, and a surrounding event horizon. The distance from the singularity to the event horizon is called the Schwarzschild radius (RSch). The event horizon is a one-way surface: Things can fall in, but nothing can get out.