Astronomical instruments, first described by Greek authors, were used for centuries by generations of astronomers - to measure positions of the celestial objects on the sky, and by travellers - for navigation. Read articles about the most popular instruments, and watch short videos that describe principles of operation:

Links to instrument material
Instruments Article Video
Armillary sphere Museum of History of Science YouTube
Astrolabe Museum of History of Science YouTube
Quadrant Museum of History of Science YouTube
Sextant Wikipedia/Sextant YouTube

Last modified: Tuesday, 2 February 2016, 1:37 PM