books.google.co.uk - Essential Astrophysics is a book to learn or teach from, as well as a fundamental reference volume for anyone interested in astronomy and astrophysics. It presents astrophysics from basic principles without requiring any previous study of astronomy or astrophysics. It serves as a comprehensive introductory...https://books.google.co.uk/books/about/Essential_Astrophysics.html?id=PVJEAAAAQBAJ&utm_source=gb-gplus-shareEssential Astrophysics
