Overview: Specifically written for amateur astronomers.Extended definitions provide additional information and instruction on many topics.Over 200 illustrations.Extensive Appendices, including the Messier and CThe purpose of this book is two-fold. Firstly to provide a handy quick source of ref erence of the terms, techniques, instruments, formulas, processes, etc. , for practising observers, whether it is their first look through someone else‘s small telescope, or whether they have spent decades building their own instruments, observing with them and are regularly producing results to rival t
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