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project:back_to_the_greek_universe [2019/09/20 09:55] – [Back to the Greek Universe] weibelthproject:back_to_the_greek_universe [2020/02/06 14:44] (current) – [Data] weibelth
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   - Saturn   - Saturn
   - Fixed stars   - Fixed stars
-{{ :project:universum.png?319x328|Renaissance woodcut illustrating the Ptolemaic sphere model}}The movements of the celestial bodies as they appear to earthlings are expressed as a series of superposed circular movements (see [[https://en.wikipedia.org/wiki/Deferent_and_epicycle|deferent and epicycle]] theory), characterized by varying radius and speed. The tabular values that serve as inputs to the model have been extracted from the literature. +{{ :project:universum.png?319x328|Renaissance woodcut illustrating the Ptolemaic sphere model}}The movements of the celestial bodies as they appear to earthlings are expressed as a series of superposed circular movements (see [[https://en.wikipedia.org/wiki/Deferent_and_epicycle|deferent and epicycle]] theory), characterized by varying radius and speed. The tabular values that serve as inputs to the model have been extracted from literature. 
  
 [[https://www.youtube.com/watch?v=fm-YscWz1Xc|Demo Video]] [[https://www.youtube.com/watch?v=fm-YscWz1Xc|Demo Video]]
  
-Claudius Ptolemy (~100-160 AD) was a Greek scientist working at the library of alexandria. One of his most important works, the «Almagest», sums up the geographic, mathematical and astronomical knowledge of the time. It is the first outline of a coherent system of the universe in the history of mankind.+Claudius Ptolemy (~100-160 AD) was a Greek scientist working at the library of Alexandria. One of his most important works, the «Almagest», sums up the geographic, mathematical and astronomical knowledge of the time. It is the first outline of a coherent system of the universe in the history of mankind.
  
-Back to the Greek Universe is a VR model that rebuilds Ptolemy’s system of the universe on a scale of 1/1 billion. The planets are 100 times larger, the Earth rotates 100 times more slowly. The planet orbits periods are 1 million faster than they would be according to Ptolemy’s calculations.+Back to the Greek Universe is a VR model that rebuilds Ptolemy’s system of the universe on a scale of 1/1 billion. The planets are 100 times larger, the earth rotates 100 times more slowly. The planet orbits periods are 1 million times faster than they would be according to Ptolemy’s calculations.
  
 Back to the Greek Universe was coded and presented at the Swiss Open Cultural Data Hackathon/mix'n'hack 2019 in Sion, Switzerland, from Sept 6-8, 2019, by Thomas Weibel, Cédric Sievi, Pia Viviani and Beat Estermann. Back to the Greek Universe was coded and presented at the Swiss Open Cultural Data Hackathon/mix'n'hack 2019 in Sion, Switzerland, from Sept 6-8, 2019, by Thomas Weibel, Cédric Sievi, Pia Viviani and Beat Estermann.
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 ===== Instructions ===== ===== Instructions =====
  
-{{:project:qrcode.png?nolink&250 |}}This is how to fly Ptolemy's spaceship:+{{:project:qrcode.png?nolink&250 |}}This is how to fly Ptolemy's virtual spaceship:
   * Point your smartphone camera towards the QR code, tap on the popup banner in order to launch into space.   * Point your smartphone camera towards the QR code, tap on the popup banner in order to launch into space.
   * Turn around and discover the ancient greek solar system. Follow the planets' epicyclic movements (see above).   * Turn around and discover the ancient greek solar system. Follow the planets' epicyclic movements (see above).
   * Tap in order to travel through space, in any direction you like. Every single tap will teleport you roughly 18 million miles forward.   * Tap in order to travel through space, in any direction you like. Every single tap will teleport you roughly 18 million miles forward.
-  * **Home:** Point your device vertically down and tap in order to teleport back to earth.+  * **Back home:** Point your device vertically down and tap in order to teleport back to earth.
   * **Gods' view:** Point your device vertically up and tap in order to overlook Ptolemy’s system of the universe from high above.   * **Gods' view:** Point your device vertically up and tap in order to overlook Ptolemy’s system of the universe from high above.
  
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 ===== Data ===== ===== Data =====
  
-The data used include 16th century prints of Ptolemy's main work, the [[https://en.wikipedia.org/wiki/Almagest|Almagest]] (both in greek (original language) and latin) and high-resolution surface photos of the planets in Mercator projection. The photos are mapped onto rotating spheres by means of Mozilla's web VR framework [[https://aframe.io/|A-Frame]].+The data used include 16th century prints of Ptolemy's main work, the [[https://en.wikipedia.org/wiki/Almagest|Almagest]] (both in greek and latin) and high-resolution surface photos of the planets in Mercator projection. The photos are mapped onto rotating spheres by means of Mozilla's web VR framework [[https://aframe.io/|A-Frame]].
  
 [[https://commons.wikimedia.org/wiki/File:Whole_world_-_land_and_oceans_12000.jpg|{{:project:earth-small.jpg?400x200|Earth}}]] [[https://commons.wikimedia.org/wiki/File:Whole_world_-_land_and_oceans_12000.jpg|{{:project:earth-small.jpg?400x200|Earth}}]]
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 2019/09/08 v1.01: Cockpit with time and distance indicator\\ 2019/09/08 v1.01: Cockpit with time and distance indicator\\
 2019/09/13 v1.02: Space flight limited to stars sphere, minor bugfixes\\ 2019/09/13 v1.02: Space flight limited to stars sphere, minor bugfixes\\
-2019/09/17 v1.03: Adjusted planet ecliptics+2019/09/17 v1.03: Planet ecliptics adjusted
 ===== Media ===== ===== Media =====
  * Back to the Greek Universe [[https://make.opendata.ch/wiki/_media/project:greekuniverse-final2.mp4|Video (mp4)]], public domain  * Back to the Greek Universe [[https://make.opendata.ch/wiki/_media/project:greekuniverse-final2.mp4|Video (mp4)]], public domain
project/back_to_the_greek_universe.1568966114.txt.gz · Last modified: 2019/09/20 09:55 by weibelth