1) Astronomical instrument 2) Moon of Jupiter
Found on
https://www.crosswordclues.com/clue/celatone
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. == Modern versions == In 2013, Matthew Dockrey created a replica celatone, using notes from a version created by Samuel Parlour. F....
Found on
http://en.wikipedia.org/wiki/Celatone
No exact match found.
