Karl Johan Donner & Hannu Karttunen 
Fundamental Astronomy [PDF ebook] 

Fundamental Astronomy gives a well-balanced and comprehensive introduction to the topics of classical and modern astronomy. While emphasizing both the astronomical concepts and the underlying physical principles, the text provides a sound basis for more profound studies in the astronomical sciences. The fourth edition of this successful calculus-based textbook and reference includes a wealth of new information and several chapters are restructured for clarity and improved organization. The chapters on radiation mechanisms and temperatures have been combined, and some of the material from the appendices has been redistributed to appropriate places throughout the text. In addition, the chapters on the solar system and cosmology are rewritten to reflect new understanding and tables in the appendix on the theory of relativity have been updated. Long considered a standard text for physical science majors, Fundamental Astronomy is also an excellent reference and entree for dedicated amateur astronomers.