Astronomy: The Evolving Universe - Michael Zeilik - Google Books

http://books.google.de/books?id=yc9b9BAVn20C&pg=PA188

Thoroughly updated and re-conceived, Astronomy, Ninth Edition, equips the introductory astronomy student with the essential tools for understanding the cosmos. Michael Zeilik has revised the pedagogy of his successful textbook based on recent research in…