Cosmology is the study of the origin, evolution, and structure of the universe. This eBook focuses on contemporary cosmology, based upon the notable Big Bang theory. Readers will gain an enriched understanding of the theoretical frameworks used to understand our universe and how it came to be. This book explains how cosmology has evolved from prehistory to the contemporary Big Bang model by exploring topics like the cosmic microwave background (CMB), dark matter, dark energy, and the fate of the universe.