A metric designed by Friedman, Lemaitre, Robertson, and Walker described the universe as being a smooth and homogenous place. The second edition of the book Modern Cosmology, by authors Scott Dodelson and Fabian Schmidt provides an introduction to cosmology, beginning with the basic principles defined in that classic metric. Dark matter, dark energy, recombination, and big bang nucleosynthesis are discussed and defined, and the reader is exposed to perturbations regarding the existence of an FLRW universe. Using the Einstein-Boltzman equations, the evolution of primordial generation, and the observational consequences of that evolution are explored in great detail. Modern Cosmology is an essential resource for those seeking to learn more about the fascinating topic that is cosmology!

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