Celatone

From Wikipedia, the free encyclopedia

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.

[edit] See also

• Longitude prize

[edit] References

• Sobel, Dava (1995). Longitude The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time. Penguin. ISBN 0-14-025879-5.