Books by Philip S. Harrington

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Astronomy For All Ages


The Deep Sky: An Introduction


Eclipse!


Star Ware, 4th edition


Star Watch


Touring the Universe Through Binoculars

 

The Deep Sky: An Introduction

NGP: New General Program of Deep-Sky Objects

 

As mentioned in the introduction of The Deep Sky: An Introduction, the freeware program NGP by Dean Williams of Cabot, AR, is a very handy reference for deep-sky observers.  NGP records observations of thousands of deep-sky objects made by many amateur astronomers through a great variety of telescopes.

To get your free copy, click here.  And if you have any questions about NGP, drop Dean a line by clicking here.

Enjoy!