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Google Earth Plug-in: Sundial, Halde Hoheward, Germany

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The Obelisk – The Sundial
The seeming movement of the sun in the sky, resulting in the discrimination between day and night, was one of the earliest observations of nature performed by men. It enables us to experience the phenomenon “time” with our own senses. The first examples for telling the time with the help of the sun or its shadow date back to the Ancient World. The are numerous archetypes for sundials built inmany different styles, using different techniques.
The archetype for the horizontal sundial on top of the slagheap Hoheward is the sundial of the Roman Emperor Augustus on the Campus Martius in Rome.
(It is unknown, whether this ancient obelisk was part of a complete sun dial with hour and declination lines on the morning and afternoon side or whether only a meridian line existed to measure the elevation of the sun in upper culmination. The today's scientific knowledge indicates the existence of a meridian.) The observation of the Obelisk's shadow on the sundial enables the observer to easily determine date and time. Apart from “time” one can also experience the laws of celestial mechanics. Men encounter themselves in relation to the cosmos.
Representing the first step in the realisation of the Astronomical Theme Park the Obelisk was opened on May 17th, 2005. It is located on the already completed south-eastern plateau of the slagheap at a height of 140 m above sea level. The shadowed area is 62 m in diameter.

http://www.horizontastronomie.de

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