Astronomical Clock on the Town Hall, Old Town Square, UNESCO World Heritage Site, Prague, Czech Republic, Europe

Male Antarctic fur seal (Arctocephalus gazella), hauled out on Astrolabe Island, Bransfield Strait, Antarctica, Polar Regions

Large iceberg off the shore of Astrolabe Island, Bransfield Strait, Trinity Peninsula, Antarctica, Polar Regions

Large iceberg off the shore of Astrolabe Island, Bransfield Strait, Trinity Peninsula, Antarctica, Polar Regions

Astrolabe in museum, Delhi Museum, Delhi, India, Asia

Islamic manuscript showing astronomers at work

Kitab Ramda Al Munajimin, University Library, Istanbul, Turkey, Europe

Astrolabe 890/1485-6, Awhad Muhammad Iran, John Addis Gallery, British Museum, London, England, United Kingdom, Europe

Arabic brass astrolabe dating from 16th century, Damascus Museum, Syria, Middle East

Islamic manuscript showing astronomers at work

Astrolabe in museum, Delhi Museum, Delhi, India, Asia

Astrolabes, Delhi Museum, India, Asia