Antikythera mechanism, Greece.
The Antikythera mechanism is generally referred to as the first known analogue computer. Its construction relied on theories of astronomy and mathematics developed by Greek astronomers, and it is estimated to have been created around the late second century BC. The Antikythera mechanism was discovered in 45 metres of water in the Antikythera shipwreck on island of Antikythera. The original mechanism apparently came out of the Mediterranean as a single encrusted piece. Soon afterward it fractured into three major pieces. Other small pieces have broken off in the interim from cleaning and handling, and still others were found on the sea floor by other expeditions. On the front face of the mechanism there is a fixed ring dial representing the ecliptic, the twelve zodiacal signs marked off with equal 30 degree sectors. Outside of that dial is another ring which is rotatable, marked off with the months and days of the Sothic Egyptian calendar, twelve months of 30 days plus five intercalary days. The first task, then, is to rotate the Egyptian calendar ring to match the current zodiac points. The Egyptian calendar ignored leap days, so it advanced through a full zodiac sign in about 120 years. #electronics #technology #tech #socialenvy #shopstemdesigns #electronic #device #gadget #gadgets #instatech #instagood #geek #techie #nerd #techy #photooftheday #computers #laptops #hack #screen