Textbook in PDF format

Now in its fourth edition, this highly regarded book is ideal for those who wish to solve a variety of practical and recreational problems in astronomy using a scientific calculator or spreadsheet.
Updated and extended, this new edition shows you how to use spreadsheets to predict, with greater accuracy, solar and lunar eclipses, the positions of the planets, and the times of sunrise and sunset. With clear, easy-to-follow instructions, shown alongside worked examples, this handbook is essential for anyone wanting to make astronomical calculations for themselves. It can be enjoyed by anyone interested in astronomy, and will be a useful tool for software writers and students studying introductory astronomy.
Gives easy-to-understand, simplified methods for use with a pocket calculator.
Covers orbits, transformations and general celestial phenomena, for use anywhere, worldwide.
High-precision spreadsheet methods for greater accuracy are available at www.cambridge.org.
Peter Duffett-Smith is a physicist by training and a radio astronomer by trade. He is a Reader in Experimental Radio Physics at the Cavendish Laboratory, University of Cambridge, and is a Fellow of Downing College, Cambridge and of the Royal Astronomical Society.
Jonathan Zwart is a Postdoctoral Research Scientist at the Columbia Astrophysics Laboratory in New York, and a co-founder and former editor of Cambridge’s science magazine, BlueSci