Looking through the physics book I came across the black hole. If you went through a black hole your body would be stretched, flattened, and eventually pulled apart. This is on page This has to deal with Chapter 7 Gravitation. (Not my words!
Okay this picture makes it easy for me to explain to the people who don't know what this really is, tilt your computer screen until the milky way is level with the ground(your computer will be sideways) now what you are doing is looking towards the center
"The Chart of Cosmic Exploration features hand-illustrated renderings of every orbiter, lander, rover, flyby, and impactor to ever successfully slip the surly bonds of Earth's orbit. Plus all of our pretty-cool planets in our pretty-great Solar System.