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  • How was it recovered? | The Antikythera Mechanism Research Project
    help them But by divers using closed flexible diving suits with copper diving helmets and surface supplied air The diving helmet was invented by Charles Anthony Deane in 1823 and the first workable SCUBA by William James in 1825 However Augustus Siebe who in 1837 attached Deane s helmet to a closed diving suit is often regarded as the father of diving As an indication of how advanced diving technology was in 1843 the British Royal Navy set up the world s first diving school after several successful underwater salvage and demolitions By late the 1870 s the Greek sponge divers had fully adopted the diving suit and almost certainly the sponge divers who discovered and those who subsequently worked on the Antikythera Wreck would have used a diving suit and helmet with an air hose attached to the surface In 1905 many Greek sponge divers were lured to Tarpon Springs Florida and with their advanced technology of flexible diving suits copper helmets and surface supplied air the Greek divers consistently brought in more than four times as many sponges per man per hour than harvesters using long handled hooks or rakes from the surface Tarpon Springs was ultimately to

    Original URL path: http://www.antikythera-mechanism.gr/faq/general-questions/how-was-it-recovered (2016-02-11)
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  • What are the Metonic and Callipic Cycles? | The Antikythera Mechanism Research Project
    year in 432 BC It was his observation that a period of 19 solar years is almost exactly 235 lunar months and rounded to full days equates 6940 days In the following century Callippus developed the Callippic cycle This was a more accurate approximation obtained by taking one day away from every fourth of Meton s cycles so creating a 76 year cycle with a mean year of exactly 365 25 days The Metonic and Callipic cycles are key to modeling a long term lunar solar calendar but the 19 year cycle is also close to an eclipse cycle and could potentially predict eclipses for about 4 or 5 recurrences of eclipses However the Ancient Greeks had knowledge of better eclipse cycles Further reading 1 2 1 The Metonic and Callippic Cycles Fotheringham J K Monthly Notices of the Royal Astronomical Society Volume 84 p 10 1924 2 Greek and Roman Chronology Calendars and Years in Classical Antiquity Samuel Alan Edouard p 307 1972 Bookmark Search this post with Google Plus One Pinterest Login or register to post comments Français Tags Astronomical questions A simple explanation of the Metonic cycle Submitted by ilan vardi on Tue 01 10 2013 12 11 The current western Gregorian calendar corresponds to the return of the seasons In other words if you give a date of the year and a location then you should have a good idea of the weather For example in Europe July is hot and January is cold However our months do not represent any physical phenomenon knowing the day of the month doesn t tell you anything about the natural surroundings However there are calendars where the months keep track of the phases of the Moon the first of the month is always a new Moon and the 15th

    Original URL path: http://www.antikythera-mechanism.gr/faq/astronomical-questions/what-are-the-metonic-and-callipic-cycles (2016-02-11)
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  • What does it do? | The Antikythera Mechanism Research Project
    showing the positions of the Sun and the Moon The Moon indicator is ingeniously adjusted to show the fist anomaly of the Moon s orbit It is reasonable to suppose the Sun indicator had a similar adjustment The front dial also includes a second mechanism with a spherical model of the Moon that displays its phase There is reference in the inscriptions for the planets Mars and Venus and it would have certainly been within the capabilities of the maker of this mechanism to include gearing to show their positions There is some speculation that the mechanism may have had indicators for the 5 planets known to the Greeks Finally the front dial includes a parapegma used to mark the rising and setting of specific stars Each star is thought to be identified by Greek characters which cross references details inscribed on the mechanism The upper back dial is in the form of a spiral with 47 divisions per turn displaying the 235 months of the 19 year Metonic cycle This dial contains a smaller subsidiary dial which displays the 76 year Callippic cycle There are 4 Metonic cycles within 1 Callippic cycle Both of these cycles are important in

    Original URL path: http://www.antikythera-mechanism.gr/faq/general-questions/what-does-it-do (2016-02-11)
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  • How was it made? | The Antikythera Mechanism Research Project
    in general and metal working specifically was superb Indeed to prove how easily the mechanism could be manufactured in this way Michael Wright has built a fully working model of the Mechanism using traditional methods In doing so he observed that the only really difficult part was the manufacture of the front dial with its recessed ring Bookmark Search this post with Google Plus One Pinterest Login or register to

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  • Πρόγραμμα Μελέτης Μηχανισμού Αντικυθήρων
    περιθώριο στη φαντασία που δεν ήθελε και πολύ να ξεπεράσει τα όρια της λογικής Ότι πρόκειται για έναν μηχανισμό είναι σίγουρο και μάλιστα για τον πιο σύνθετο μηχανισμό της αρχαιότητας 2ος 1ος αιώνας π Χ που δεν έχει παρόμοιό του στα 1 300 χρόνια που ακολουθούν Είναι επίσης βέβαιο ότι σχετίζεται με φαινόμενα του ουρανού και ότι αποτελεί ένα είδος πολύπλοκου μηχανικού υπολογιστή Συνέχεια Ψηφιακές ακτινογραφίες Οι ψηφιακές ακτινογραφίες όλων των γνωστών σωζόμενων θραυσμάτων του Μηχανισμού των Αντικυθήρων που αποκτήθηκαν με την τεχνογνωσία της Tek χρησιμοποιώντας το σύστημα BladeRunner βρίσκονται στην ιστοσελίδα της Shaw Inspection Systems πρώην X Tek Industrial Οι ψηφιακές ακτινογραφίες που διατίθενται περιλαμβάνουν όλα τα κυρίως θραύσματα θραύσματα A έως G αλλά και όλα τα μικρά θραύσματα θραύσματα 1 έως 75 και αποκτήθηκαν με τη χρήση του συστήματος BladeRunner CT Υπολογιστική Τομογραφία της X Tek Συνέχεια PTM υψηλής ανάλυσης Οι επιφάνειες των 82 εναπομείναντων θραυσμάτων του Μηχανισμού των Αντικυθήρων απεικονιζόμενες από την ομάδα των εργαστηρίων της Hewlett Packard είναι διαθέσιμες προς μεταφόρτωση στην ιστοσελίδα των εργαστηρίων της HP Έχουν καταγραφεί 82 PTM ενω ο αριθμός αυτός είναι εντελώς συμπτωματικός αφού κάποια μικρά θραύσματα είναι ομαδοποιημένα σε ένα μόνο PTM ενώ καθένα από τα μεγαλύτερα θραύσματα απεικονίζονται σε παραπάνω από ένα PTM Θα χρειαστεί να μεταφορτώσετε τον PTM viewer ο οποίος είναι διαθέσιμος στην ίδια ιστοσελίδα για να αναζητήσετε τα δεδομένα στον υπολογιστή σας Συνέχεια Φυσικά μοντέλα του Μηχανισμού των Αντικυθήρων Το πρώτο μοντέλο του Μηχανισμού των Αντικυθήρων κατασκευάστηκε κατά την δεκαετία του 1930 από τον Ιωάννη Θεοφανίδη Ένα μοντέλο βασισμένο στο έργο του Πράις κατασκευάσθηκε την δεκαετία του 1980 από τον Ρόμπερτ Ντερόσκι και δωρίσθηκε από τον Πράις στο Εθνικό Αρχαιολογικό Μουσείο στην Αθήνα Στην Αυστραλία ο ωρολογοποιός Φράνκ Πέρσιβαλ κατασκεύασε ένα μοντέλο βασισμένο στις έρευνες των Άλαν Μπρόμλεϋ και Μάικλ Ράιτ ο οποίος μεταγενέστερα ανέπτυξε το

    Original URL path: http://www.antikythera-mechanism.gr/el (2016-02-11)
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  • The Antikythera Mechanism Research Project
    pages sont en anglais accessibles depuis la page centrale http www antikythera mechanism gr Plus spécialement les fiches des ouvrages en langue anglaise cités en bibliographie ne sont pas traduites Ainsi les références en anglais sont accessibles depuis la page bibliography anglaise au http www antikythera mechanism gr bibliography Les références en grec depuis http www antikythera mechanism gr el bibliography etc Aperçu du projet Il y a plus d un siècle un mécanisme extraordinaire fut retrouvé au fond de la mer par des pêcheurs d éponge près de l île d Anticythère Cette découverte provoqua la stupéfaction parmi la communauté internationale d experts de l Antiquité S agissait il d un astrolable D un planétarium ou d une horloge astronomique Ou de quelque chose d autre La suite Modèles de la machine d Anticythère Cette page sera mise à jour en Janvier 2015 Veuillez consultez la version en Anglais pour plus de détails La suite Tweets by antikytheradive News Retour à Anticythère plus qu un mois Prolongation de l exposition Anticythère Finale du concours C génial Expositions Informations sur les expositions Mécanisme d Anticythère organisées dans différentes cités européennes Upgrade tasks Check upgrade status Update modules Enable maintenance mode

    Original URL path: http://www.antikythera-mechanism.gr/fr (2016-02-11)
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  • User account | The Antikythera Mechanism Research Project
    Applications from anonymous users or from users that haven t expressed their interest in the Antikythera Mechanism and or archaeology epigraphy astronomy history philosophy and didactics of science and technology etc will be deleted without notification Only for journalists at the Apply for roles dropdown list choose Press Please fill in the Media information and Personal information fields Account information Username Spaces are allowed punctuation is not allowed except for periods hyphens and underscores E mail address A valid e mail address All e mails from the system will be sent to this address The e mail address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by e mail Apply for role Select a role press translator Academic information Affiliation An institution Position Your position within your Institution Media information Organization The name of your organization e g The New York Times This field is mandatory only for journalists Display Organization publicly Media type Printed press journal Printed press magazine Television Radio Website News agency Display Media type publicly Personal information Real name Your real name This is mandatory but won t be

    Original URL path: http://www.antikythera-mechanism.gr/user/register (2016-02-11)
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  • User account | The Antikythera Mechanism Research Project
    account User account Create new account Log in Request new password Username or e mail address CAPTCHA This question is for testing whether you are a human visitor and to prevent automated spam submissions Math question 9 1 Solve this simple math problem and enter the result E g for 1 3 enter 4 Tweets by antikytheradive Upgrade tasks Check upgrade status Update modules Enable maintenance mode Verify maintenance theme

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