The identification of an eleventh-century Islamic astrolabe bearing both Arabic and Hebrew inscriptions makes it one of the oldest examples ever discovered and one of only a handful known in the ...

The item in question was a 1,000-year-old astrolabe, a tool designed by the ... roughly to “star-taker”; experts estimate it was invented sometime between the second and fifth centuries ...

there are more than 1,000 applications for an astrolabe, from astronomy to architecture to farming and, of course, navigation. Astrolabes were first invented in the ancient Greek world in the 3rd ...