Galileo's Instruments of Discovery
With these various instruments, Galileo Galilei was able to look into space and change our view of the universe.
- By Sarah Zielinski
- Smithsonian.com, July 20, 2009
At the center of this instrument sits a globe representing the earth. The bands around it pivot on a common center and illustrate the paths of the sun and moon, known planets and important stars. The device was invented sometime in the last few centuries before Christ, but the sphere became widely used in Europe by a thousand years ago. This armillary sphere dates to 1578.