HISTORY
THE MUSLIM WORLD AND AFRICA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Compass
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Astrolabe
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Abacus
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Caravel
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Sundial
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Detailed explanation-1: -astrolabe, any of a type of early scientific instrument used for reckoning time and for observational purposes. One widely employed variety, the planispheric astrolabe, enabled astronomers to calculate the position of the Sun and prominent stars with respect to both the horizon and the meridian.
Detailed explanation-2: -A sextant is a tool for measuring the angular altitude of a star above the horizon.
Detailed explanation-3: -The front of the astrolabe shows a map of the night sky in the form of a rotating, net-like, rete. The rete was also sometimes described by medieval writers with its Arabic name, alhanthabuth or alancabut, meaning spider. The spikes on the rete indicate the positions of individual stars.
Detailed explanation-4: -The astrolabe was used to determine latitude by measuring the angle between the horizon and Polaris, also called the North Star, the Pole Star, or Stella Maris (Star of the Sea).
Detailed explanation-5: -Hold the astrolabe vertically. Align the alidade with the Sun. Read off the angle of the alidade from the ring on the back of the astrolabe. Check online to see if you’ve got it right. More items •25-May-2022