Many of the laws of physics we take for granted do not apply outside the earth's atmosphere. Extraterrestrial physics tend to differ considerably from physics on Earth, and astrophysicists and other scientists who study space use experiments and theoretical research to try to better understand these differences. This volume helps explain the fascinating but complex concepts that make up the field of extraterrestrial physics, including quarks, dark energy, the theory of general relativity, quantum mechanics, space plasma, and the Higgs boson. Experts and writers will offer clarification on the topics animating extraterrestrial physics and explain current research that has advanced our understanding of it.