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Posts tagged as “oldest”

Oldest astrolabe discovered in sunken Portuguese ship

Oldest astrolabe discovered in sunken Portuguese ship An astrolabe recovered from a sunken Portuguese armada ship has been verified – twice – as the oldest of its type ever discovered. Astrolabes are instruments that were widely used from the classical period through to the late Middle Ages. They were deployed by astronomers and navigators as a reliable method of calculating position in relation to the sun, other stars, and the horizon. So useful were they that in a recent interview…