Tag Archive: Astrolab

This medieval astrolabe is officially world’s oldest known such instrument

A mariner’s astrolabe recovered from the wreck of one of Portuguese explorer Vasco da Gama’s ships is now officially the oldest known such artifact, according to a new paper in the International Journal of Nautical Archaeology. The device is even going into the Guinness Book of World Records, along with the ship’s bell, now that the age of…