دانلود کتاب Navigating the Night Sky: How to Identify the Stars and Constellations

From the reviews:"The author, who is a well-known Portugese amateur astronomer, methodically explains how to recognize the brighter stars and major constellations and, thus, how to find one’s way around the night sky. … This book does an effective job of doing what it sets out to do. I recommend it to anyone who wants to explore the night sky for the first time and understand how the night sky visible to us changes during the night and during the year." (Jocelyn Tomkin, The Observatory, Vol. 125 (1186), 2005)"The book is about how to identify the stars and constellations … . This book comprises a nice selection of careful thought out diagrams which fit in beautifully with the text … . I would really recommend it to someone who is new to astronomy or as a reference book for the regular observer. … With the aid of this book … even the newest observer will be off to a flying start. … The language of the book is easily accessible … ." (Samuel George, Photopresse, Issue: 44, October, 2004)"The book is targeted at newcomers to astronomy … . the book is interesting and accessible, the concepts discussed are easy to understand and the content flows naturally, with chapters on identifying the constellations, stars and the celestial sphere. … the book closes with 40 pages of appendices with lots of useful tables and data. The diagrams … are especially clear and concise … . This book would certainly point the newcomer in the right direction! I would recommend this practical guide … ." (Mark Allison, Popular Astronomy, July-September, 2006)