The astrolabe is an ancient astronomical instrument used to determine the altitude of celestial bodies, such as stars and planets, in relation to the observer's position on Earth. It consists of a rotating disk with a sighting mechanism that allows users to measure the angle between the horizon and a celestial body. Navigators and astronomers in the past used the astrolabe for celestial navigation, timekeeping, and determining the positions of stars.
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Oh, honey, an astrolabe is a fancy ancient tool used for navigating the stars. Sailors used it back in the day to find their way around the high seas. So, if you ever find yourself lost in the middle of the ocean, just whip out your trusty astrolabe and start stargazing - you might just find your way back home.
It was invented in the Hellenistic era by Apollonius of Perga around 220 BC. However it has also been attributed to Hipparchus around 150 BC
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