Begin to understand the cosmos with this easy-to-use introduction Astrophysics is the application of physics to astronomical studies, dedicated to understanding the properties of celestial objects even from an immeasurable distance. Cosmology is the study of the Universe itself: its properties, its origins, its ongoing evolution. Together, these two are among the foundational subfields of astronomy, producing extraordinary insights into the broader cosmos we inhabit. Introduction to Astrophysics & Cosmology provides a foundational introduction to these two subjects, intended for interested students with little to no prior knowledge of astronomy. Emphasizing basic physical principles throughout, it covers astronomical bodies and spaces at all scales, from the whole cosmos to our own solar system. The result is an indispensable guide for students wishing to familiarize themselves with the study of our Universe. Introduction to Astrophysics & Cosmology readers will also find: Discussion of astronomical tools such as telescopes and more Problems and self-assessment questions, with solutions, at the conclusion of each chapter Links to other valuable online resources Introduction to Astrophysics & Cosmology is ideal for undergraduate physics or astronomy students, as well as general readers with some physical knowledge desiring an introductory astronomy text.