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!
Listening' to black holes form with gravity waves Gravity waves are ripples in space generated by extreme cosmic events such as colliding stars, black holes, and supernova explosions, which carry vast amounts of energy at the speed of light.
PHD Comics: Gravitational Waves Explained Simple explanation but really interesting for further understanding on gravitational waves. "That's one small step for man, one giant leap for mankind" Neil Armstrong quote Mehr
Simeis 147 (Spaghetti Nebula) is a large SuperNova remnant in the constellations of Taurus & Auriga. It is the result of a SN explosion about years ago. It is 3000 light years away and about 140 light years across - Massive!