Telescopes and Techniques: An Introduction to Practical Astronomy

By C.R. Kitchin

ref pages: 59-77, 80-81, 83


Eye Witness Handbooks: Stars and Planets:

The visual guide to the night sky viewed from around the world

By Ian Ridpath

ref pages: 16-21


Astronomy Through the Ages: The story of the human attempt to understand the universe.

By Robert Wilson



The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time

By Dava Sobel

ref page: 90,91



Heavenly Mathematics: Highlights of Cultural Astronomy


Celestial Navigation; How it works


Introduction to Celestial Navigation


XTant project- Build your own sextant


Interactive sextant


NOVA Online | Shackleton’s Voyage of Endrance | How a Sextant Works | PBS


NOVA Online | Shackleton’s Voyage of Endrance | Navigation by Sextant | PBS


Celestaire – Navigation Instruments: How does celestial navigation work?



Eric Weisstein's World of Astronomy


Astronomy On-Line Measuring the Altitude of the North Pole Star


celestial navigation for dummy


Celestial Navigation Net




General Sight Reduction


explanatory articles$32Sphere


Selected Stars, Listed from West to East


Spherical Coordinates


medieval nag instru


Epact Scientific Instruments of Medieval and Renaissance Europe


Astronomical Instruments


The History of Sextant


Find latitude by Polaris





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