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The measurement of the altitude of the North Star yields the latitude and the altitude of the Sun and stars yields the time. healthpersonalcare The instrument fount at Antikithyra has a lot of metal healthpersonalcare wheels arranged in a way that simulates the movement of the stars and does the required calculations! Who healthpersonalcare designed it and who made it with such accuracy remains a mystery. But it is clear enough that is not an astrolabe but a kind of astrological calculator. In the astrolabe there were 27 different circular gears that were connected all together and were put into movement by a hand shaft. Everything was inside a wooden box with possible dimensions of 35 x 17 x 10 cm. On the front face there were two disks with indications about the date of the month according the sun, and the date according the moon. On the back face there were two other disks, one showing the moon month and the other the moon eclipses.
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