"Cosmology remains the classic introduction to modern cosmology for undergraduates. While designed as the main text for a course given at second or third year level, it is sufficiently self-contained for anyone with school science to understand. There is a strong emphasis on observational cosmology, with introductory chapters on the visible universe, our galaxy and other galaxies and the empirical basis for cosmological theory. After an account of the big bang model, there are chapters on the early stages of the big bang and galaxy formation. Finally, there are chapters on cosmological tests and on alternative theories. A feature of the book is its updated epilogue of twenty controversies in cosmology today. Latest results from the WMAP mission have been added and a wealth of new material, including a stronger emphasis on the cosmological constant. The book has an extensive glossary and the exercises have been substantially expanded. A strongest emphasis on the physical basis for cosmology is included."--BOOK JACKET.