Astrolabes were early scientific instruments that can be traced back to the 6th century AD. They were used for reckoning time as well as astronomical exploration, navigation and astrology. In medieval Europe, astrolabes were widely used for astrological purposes. By the mid-15th century, sailors adopted the device to navigate at sea. It enabled the determination of the position of the sun and prominent stars in relation to both the horizon and the meridian. Astrolabes represent a unique blend of science and myth that reveals the logic of an earlier time, when humans were still trying to make sense of the natural world. Smartminting® (Ultra High Relief). 2023 Cook Islands Historic Instruments Astrolabe 2oz Silver Antiqued Coin. ITEM SPECIFICS YEAR OF ISSUE: 2023 ISSUING COUNTRY: Cook Islands WEIGHT: 2 oz COMPOSITION. They were uséd for reckoning time as well as astronomical exploration, navigation and astrology. In medieval Europe, astrolabes were widely uséd for astrological purposes. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. 2022 Niue Lunar Year of the Tiger Colorized Proof 1 oz Silver Coin NGC PF 70 UCA. 2020 Tuvalu Homer Simpson. 5oz Silver Colorized Coin NGC MS 70. 2021 Tuvalu Gods of Olympus Hades 1oz Silver Coin NGC MS 70. 2019 Marvel Comics The Avengers #1 Foil 1oz Silver CGC 9.8 w/Tin.