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ASTROLABE, 1574. Humphrey Coles astrolabe, 1574, showing alidade, or sight rule
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ASTROLABE, 1574. Humphrey Coles astrolabe, 1574, showing alidade, or sight rule
ASTROLABE, 1574.
Humphrey Coles astrolabe, 1574, showing alidade, or sight rule, the rete or star map, removable plate with lines of altitude, and hours within the graduated rim. Proper use of this instrument at sea will find the ships latitude and give the time of day
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Media ID 12407342
1574 Accuracy Apparatus Astrolabe Astronomy Cole Humphrey Idea Invention Navigate Star Tool
EDITORS COMMENTS
This print showcases the intricate design of an astrolabe, specifically Humphrey Coles' creation from 1574. The astrolabe is a remarkable instrument used for navigation and astronomical calculations during the Renaissance period. Its accuracy and functionality were crucial for maritime explorations. In this image, we can observe various components of the astrolabe that aid in determining a ship's latitude and time of day at sea. The alidade, or sight rule, allows sailors to measure angles between celestial bodies such as stars or the sun. This information is then used with the rete, a star map located above it, to determine one's position on Earth. The removable plate with lines of altitude further enhances precision by providing reference points for measuring celestial objects' heights above the horizon. Additionally, hours are marked within the graduated rim surrounding these elements. Humphrey Coles' astrolabe represents both an ingenious invention and a testament to human curiosity about our place in the universe. It symbolizes humanity's relentless pursuit of knowledge and exploration during this era. This stunning photograph invites us to appreciate not only its aesthetic beauty but also its historical significance as a tool that revolutionized maritime navigation and contributed to advancements in astronomy.
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