Books by Philip S. Harrington
Click on a book cover to learn more
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The Deep Sky: An Introduction |
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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!