The Search Engine Google is showing this Doodle for the 115th Anniversary of the Antikythera Mechanism's Discovery on May 17 2017

The Antikythera mechanism is an ancient analogue computer and orrery used to predict astronomical positions and eclipses for calendrical and astrological purposes

The Antikythera Mechanism tracked planetary positions, predicted lunar and solar eclipses, and even signaled the next Olympic Games.

It was probably also used for mapping and navigation. A dial on the front combines zodiacal and solar calendars, while dials on the back capture celestial cycles. Computer models based on 3-D tomography have revealed more than 30 sophisticated gears, housed in a wooden and bronze case the size of a shoebox.

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.

The mechanism was initially dated around 85 BC, but recent studies suggest it may be even older . The crank-powered device was way ahead of its time -- its components are as intricate as those of some 18th-century clocks.

Generally referred to as the first known analogue computer,the quality and complexity of the mechanism's manufacture suggests it has undiscovered predecessors made during the Hellenistic period.

The Antikythera mechanism was discovered in 45 metres (148 ft) of water in the Antikythera shipwreck off Point Glyphadia on the Greek island of Antikythera.

The first publication on the Antikythera mechanism was made in 1974 by physicist and historian Derek de Solla Price.

The mechanism includes hands or pointers for Mercury, Venus, Mars, Jupiter, and Saturn, all of which are easily visible in the sky, as well as a rotating ball that showed the phases of the Moon.

Know more at
https://www.youtube.com/watch?v=h4DiLRdx-ns

God use me for my generation positively, This man was very useful to his own generation