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Related: Editorials & Other Articles, Issue Forums, Alliance Forums, Region Forumshave you seen the google doodle for today?115th anniversary of finding the Antikythera mechanism
Antikythera mechanism
The Antikythera mechanism (Fragment A front); visible is the largest gear in the mechanism, approximately 140 millimetres (5.5 in) in diameter
The Antikythera mechanism (Fragment A back)
The Antikythera mechanism (/ˌæntᵻkᵻˈθiːrə/ ANT-i-ki-THEER-ə or /ˌæntᵻˈkɪθərə/ ANT-i-KITH-ə-rə is an ancient Greek analogue computer and orrery used to predict astronomical positions and eclipses for calendrical and astrological purposes,[5][6][7] as well as a four-year cycle of athletic games that was similar, but not identical, to an Olympiad, the cycle of the ancient Olympic Games.[8][9][10] Found housed in a 340 millimetres (13 in) × 180 millimetres (7.1 in) × 90 millimetres (3.5 in) wooden box, the device is a complex clockwork mechanism composed of at least 30 meshing bronze gears. Using modern computer x-ray tomography and high resolution surface scanning, a team led by Mike Edmunds and Tony Freeth at Cardiff University peered inside fragments of the crust-encased mechanism and read the faintest inscriptions that once covered the outer casing of the machine. Detailed imaging of the mechanism suggests it dates back to 150-100 BC and had 37 gear wheels enabling it to follow the movements of the moon and the sun through the zodiac, predict eclipses and even recreate the irregular orbit of the moon. The motion, known as the first lunar anomaly, was developed by the astronomer Hipparchus of Rhodes in the 2nd century BC, and he may have been consulted in the machine's construction, the scientists speculate.[11]
Its remains were found as one lump later separated in three main fragments, which are now divided into 82 separate fragments after conservation works. Four of these fragments contain gears, while inscriptions are found on many others.[12][13] The largest gear is approximately 140 millimetres (5.5 in) in diameter and originally had 224 teeth.
The artefact was recovered on May 17th 1901[14][15] from the Antikythera shipwreck off the Greek island of Antikythera, which in antiquity was known as Aigila.[16] Believed to have been designed and constructed by Greek scientists, the instrument has been variously dated to about 87 BC,[17] or between 150 and 100 BC,[5] or in 205 BC,[18][19] or within a generation before the date of the shipwreck (in about 150 BC).[20][21]
After the knowledge of this technology was lost at some point in antiquity, technological works approaching its complexity and workmanship did not appear again until the development of mechanical astronomical clocks in Europe in the fourteenth century.[22] All known fragments of the Antikythera mechanism are kept at the National Archaeological Museum in Athens, along with a number of artistic reconstructions of how the mechanism may have looked.[23]
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https://en.wikipedia.org/wiki/Antikythera_mechanism
SonofDonald
(2,050 posts)Is the coolest thing ever found in my estimation, there are some funeral goods from king tuts tomb that are quite intricate but the mechanism from the shipwreck just blows me away.
Imagine who designed it, who built it, who commissioned it's creation.
Unprecedented in history, just think what else may be out there lost to time or just not discovered yet.
Amazing it was even found.
niyad
(113,218 posts)to discover.
Tanuki
(14,917 posts)That is sad to contemplate, in this instance and elsewhere. Where could we be now if that knowledge had been available in the intervening millennium? I grieve for the books that have been burned, technology that withered away for lack of an apt pupil, knowledge that was deemed subversive or heretical and therefore suppressed...it is in the same vein as how I worry about our democracy.
This device is awesome and it is wonderful that tools now exist to learn more about it.
niyad
(113,218 posts)displacedtexan
(15,696 posts)...used by monks/scribes of the middle ages is because a man named Edward Johnston reverse engineered the individual broad pen nib angles and measures of letter sizes to recreate the original processes.
https://en.m.wikipedia.org/wiki/Edward_Johnston
central scrutinizer
(11,645 posts)And subsequent book burning.
shenmue
(38,506 posts)hunter
(38,309 posts)... when the mechanism was still largely a mystery.
Now with x-rays and other modern technology we know how it works well enough to build recreations.
Here's a fellow who's building one paying attention to the original methods...
niyad
(113,218 posts)hunter
(38,309 posts)... without modern tools and materials.
First you make the metal sheets... And then you work it all with hand tools and human powered drills and lathes; maybe machines like this:
SonofDonald
(2,050 posts)I knew they've made modern copy's of the device but that is so neat to see how it was actually built by hand, amazing how much talent had existed back then, and as it stated....
This probably wasn't the first time something like this was attempted.
Mind blowing.