The discovery of an 11th-century Islamic astrolabe in Verona ... More about astrolabes Astrolabes are ancient scientific instruments used for solving problems related to time and the position ...

Although perfectly familiar to the ancient Greeks ... and so it's not surprising that the oldest astrolabe to survive is an Islamic one from the tenth century. But the astrolabe I'm holding ...

The astrolabe is an ancient astronomical tool of incredible versatility, allowing the user to do everything from calculating when the sun will rise to predicting the positions of dozens of stars ...