Introduction to Cosmology

Rating:
Summary: Very well written
Review: It seems lately people have been writing very good textbooks, for example "Gravity: from the ground up", "String theory: First Course" and "Spacetime and Geometry" etc, and this is among the best. As has been mentioned, there are no tensors in this book. General relativity is introduced with equivalence principle and the metric and by investigating different kind of curvatures and corresponding metrics. Clarity is outstanding in almost every chapter.

After introducing the Friedmann, fluid and acceleration equations etc, the chapters include single-component universes, multiple-component universes, measuring cosmological parameters. dark matter, cosmic microwave background, nucleosynthesis and the early universe, inflation and the very early universe + formation of structure. I think one of the positives of this book is that the chapters are quite short and the whole book itself is quite short at 250 pages. I think this is a good thing because its much easier to stay focused/motivated when you know it wont take 10 years to reach the end. And as has been mentioned, the writing style is very understandable and not too terse. I think this book is a perfect example on how to write physics tetxbooks.

Rating:
Summary: Clear and useful
Review: This book is an excellent introduction to all facets of cosmology for anyone from advanced undergraduates on. It includes a slow immersion in the key physical concepts of current cosmology theory, and broadly covers all relevent topics, as listed in the chapter headings. However, the greatest strength of this book is in the decision to forgo detailed General Relativity derivations. Instead of pages of numbing treatment of tensor math and metrics, Ryden summarizes the results of GR that are relevant to current cosmology, presenting the Friedmann equation and the Robertson-Walker metric. While this approach might infuriate purists, it allows the student to understand cosmology from a conceptual standpoint, while providing the mathematical tools necessary for analysis, and is a sufficient general introduction for any physics or astronomy student. It also provides a strong base of knowledge for those who do wish to proceed further into the details of GR. Furthermore, the conversational style of the text makes it much easier to read than any other physics textbook I have encountered. I would recommend any student (or professional) who slogged through their cosmology studies with no sense of the overall state of the field to use this book for both brushing up on the basics and as a quick reference.