Thanks to the continuously improving ground- and space-based telescopes, cosmology now has access to data that allows for insights into increasingly earlier phases of the universe and comparisons with theoretical models. As a result, cosmology is steadily gaining importance in university astronomy courses. "Introduction to Modern Cosmology" provides a clear and easily understandable presentation of modern cosmological concepts, including numerous examples and exercises, as well as hints and final results, enabling immediate application and verification of the learned material. The book is well-structured and covers advanced topics in six separate chapters, including relativistic cosmology and neutrino cosmology. This translation of the second edition has been significantly supplemented and expanded to include the latest observations.