File:Antikythera Fragment A (Back).webp
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Summary
| DescriptionAntikythera Fragment A (Back).webp |
Français : Fragment principal de la machine d'Anticythère. Le mécanisme consiste en un système complexe de 32 roues et plaques portant des inscriptions relatives aux signes du zodiac et aux mois. L'étude des fragments suggère qu'il s'agissait d'une sorte d'astrolabe utilisée pour la navigation maritime. L'interprétation désormais généralement acceptée remonte aux études du professeur Derek de Solla Price, qui fut le premier à suggérer que le mécanisme est une machine à calculer le calendrier solaire et lunaire, c'est-à-dire une machine ingénieuse pour déterminer le temps sur la base des mouvements du soleil et de la lune, leur relation (éclipses) et les mouvements des autres étoiles et des planètes connues à cette époque. Le mécanisme fut probablement construit par un mécanicien ingénieux de l'école de Poséidonios à Rhodes. Cicéron, qui visita l'île en 79/78 a. C. rapporte que de tels engins étaient en effet conçus par le philosophe stoïcien Poséidonios d'Apamée. La conception du mécanisme d'Anticythère paraît suivre la tradition du planétarium d'Archimède, et peut être reliée aux cadrans solaires. Son mode opératoire est basé sur l'utilisation de roues dentées. La machine est datée de 89 a. C. environ et provient de l'épave trouvée au large de l'île d'Anticythère. Musée archéologique national, Athènes, n°15987.
English: Fragment A (rear) of the Antikythera mechanism. Main fragment. The mechanism consists of a complex system of 32 wheels and plates bearing inscriptions relating to the signs of the zodiac and the months. The study of the fragments suggests it was a kind of astrolabe used for maritime navigation. It is a machine for calculating the solar and lunar calendar, that is, an ingenious machine for determining the time based on the movements of the sun and the moon, their relationship (eclipses) and the movements of other stars and planets known at that time. The mechanism was probably constructed by an ingenious mechanic from the school of Poseidonius in Rhodes. Cicero, who visited the island in 79/78 BC. There are reports that such devices were indeed designed by the Stoic philosopher Poseidonius of Apamea. The design of the mechanism appears to follow the tradition of Archimedes' planetarium, and can be related to sundials. Its mode of operation is based on the use of cogwheels. The machine comes from the wreck found off the island of Antikythera. National Archaeological Museum, Athens, No. 15987. |
| Date | 25 February 2025 |
| Source | Own work |
| Author | Logg Tandy |
| Camera location | 37° 59′ 21.83″ N, 23° 43′ 59.41″ E | View this and other nearby images on: OpenStreetMap |
|---|
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
Attribution:
Logg Tandy
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| Annotations InfoField | This image is annotated: View the annotations at Commons |
1376
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Remnants of e3 and e4 of the moon mechanism.
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Part of e6.
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Part of k2, showing the pin of k1.
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Exeligmos dial face remnants.
Captions
Back of "Fragment A" of the Antikythera mechanism.
Items portrayed in this file
depicts
17,577,650 byte
3,554 pixel
3,405 pixel
image/webp
748362d6688bb13fbe9a29971c710d1e30f2c790
37°59'21.829"N, 23°43'59.408"E
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:15, 3 May 2025 | 3,405 × 3,554 (16.76 MB) | imagescommonswiki>Hubcapp | This version removes some lens glare by patching over it from a secondary source image. Raw files involved were LOG04273.AGW (patch source) and LOG04262.AGW (main image source). Original upload is LOG04262.AGW only. |
File usage
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Metadata
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| Image title | Back of 'Fragment A' of the Antikythera mechanism. |
|---|---|
| Camera manufacturer | SONY |
| Camera model | DSC-RX10M4 |
| Author | Logg Tandy |
| Copyright holder | This work is licensed under the Creative Commons Attribution ShareAlike 4.0 International License. To view a copy of this license, visit https://creativecommons.org/licenses/by-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042 USA. |
| Exposure time | 3/10 sec (0.3) |
| F Number | f/6.3 |
| ISO speed rating | 100 |
| Date and time of data generation | 18:27, 25 February 2025 |
| Lens focal length | 23.9 mm |
| Latitude | 37° 59′ 21.83″ N |
| Longitude | 23° 43′ 59.41″ E |
| URL for copyright license | https://creativecommons.org/licenses/by-sa/4.0/ |
| Width | 3,405 px |
| Height | 3,554 px |
| Bits per component |
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| Compression scheme | Uncompressed |
| Orientation | Normal |
| Number of components | 3 |
| Horizontal resolution | 350 dpi |
| Vertical resolution | 350 dpi |
| Data arrangement | chunky format |
| Software used | DSC-RX10M4 v2.00 |
| File change date and time | 18:27, 25 February 2025 |
| Exposure Program | Manual |
| Exif version | 2.31 |
| Date and time of digitizing | 18:27, 25 February 2025 |
| APEX brightness | 2.275 |
| APEX exposure bias | 0 |
| Maximum land aperture | 3.614709851552 APEX (f/3.5) |
| Metering mode | Spot |
| Light source | Unknown |
| Flash | Flash did not fire, compulsory flash suppression |
| Supported Flashpix version | 1 |
| Color space | sRGB |
| File source | Digital still camera |
| Scene type | A directly photographed image |
| Custom image processing | Normal process |
| Exposure mode | Manual exposure |
| White balance | Auto white balance |
| Digital zoom ratio | 1 |
| Focal length in 35 mm film | 65 mm |
| Scene capture type | Standard |
| Contrast | Normal |
| Saturation | Normal |
| Sharpness | Normal |
| GPS tag version | 0.0.3.2 |
| Meaning of each component |
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| Image compression mode | 8 |
| Y and C positioning | Co-sited |
| Rating (out of 5) | 0 |
| Unique ID of original document | xmp.did:b9c92e1a-ac8c-4c57-aaea-bc0910e56ca7 |
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