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Disappointment! Yet, if the title of the book were "History of Astronomy" I would give it 5 stars. However, the title of the book is: The Astronomy Book/ Big Ideas Simply Explained. By profession I am a theoretical (mathematical) ecologist and astronomy is my hobby, a field of wonders and everlasting questions. How did ancient Greeks calculate all they did calculate, how did scientist before and after Newton go about their discoveries; those were the questions I was hoping to get an answer on. Not a simple answer is given. Fact after fact, date after date, name after name. Encyclopedic knowledge, yes, but no explanations!!!