One day I was surfing the web and came across this amazing video light mapping presentation by The Macula project. It was the celebrations of the Prague Astronomical Clock 600th Anniversary! The 10 minutes video / Light mapping was projected on the outside wall of the Old Town Hall on which the astronomical clock is installed.
The Prague Astronomical Clock or Prague Orloj is a medieval astronomical clock located in Prague, the capital of the Czech Republic. The clock was first installed in 1410, making it the third oldest astronomical clock in the world and the only one still working.
(Click on the photo below to see it in full size)
(Click on the photo below to see it in full size)
The clock mechanism itself is composed of three main components:
The Astronomical Dial
(click on the photo to see it in full size)
(Click on the photo below to see it in full size)
The astronomical dial is a form of mechanical astrolabe, a device used in medieval astronomy. Alternatively, one may consider the Orloj to be a primitive planetarium, displaying the current state of the universe. The astronomical dial has a background that represents the standing Earth and sky, and surrounding it operate four main moving components: the zodiacal ring, an outer rotating ring, an icon representing the Sun, and an icon representing the Moon.
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