Celatone
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The celatone was a device invented by
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.
Modern versions
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.
See also
- Longitude prize
- Galilean moons
References
- ISBN 0-14-025879-5.
