Celatone
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.
Galileo Galilei
Galileo Galilei , was an Italian physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. His achievements include improvements to the telescope and consequent astronomical observations and support for Copernicanism...
to observe Jupiter's moons with the purpose of finding longitude
Longitude
Longitude is a geographic coordinate that specifies the east-west position of a point on the Earth's surface. It is an angular measurement, usually expressed in degrees, minutes and seconds, and denoted by the Greek letter lambda ....
on Earth. It took the form of a piece of headgear with a telescope taking the place of an eyehole.