Celatone
Illustration — Using a celatone. • Illustration — Celatone by Matthew Dockrey. Museum at the Royal Observatory, Greenwich, UK. The celatone was a device invented by Galileo Galilei to observe Jupiter's moons with the purpose of finding longitude on Earth. It took the form of a piece of headgear with a telescope taking the place of an eyehole.
Celatone
Stanislav Kozlovskiy · CC BY-SA 4.0
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Illustration — Using a celatone. • Illustration — Celatone by Matthew Dockrey. Museum at the Royal Observatory, Greenwich, UK. The celatone was a device invented by Galileo Galilei to observe Jupiter's moons with the purpose of finding longitude on Earth. It took the form of a piece of headgear with a telescope taking the place of an eyehole.
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In 2013, Matthew Dockrey created a replica celatone, using notes from a version created by Samuel Parlour. From April 2014 to January 2015, Dockrey's celatone was on display in the Royal Observatory, Greenwich in east London.
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