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Galileo's Instruments of Discovery
With these various instruments, Galileo Galilei was able to look into space and change our view of the universe.
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(Franklin Institute)
Galileo's Telescope
Galileo’s telescope anchors the exhibit “Galileo, the Medici and the Age of Astronomy,” which is at the Franklin Institute in Philadelphia until September 7, 2009. Though Galileo didn’t invent the telescope (Dutch opticians did), he improved upon it. The first telescope used a combination of two lenses within a tube, and it could magnify items by three times, but showed them upside down. But when Galileo constructed his own telescope in 1609, he added a third lens. His telescope magnified items by eight times and showed them right side up. Over the following years, Galileo built several telescopes, including one that would magnify items by a factor of 30.
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Comments
compliments.. bulent sisman
Posted by Bulent Sisman on August 12,2009 | 03:09AM
Amateurs interested in astronomy are often told to star with a decent pair of binoculars which are usually about 7 to 10 powers of magnification. It's easy to see how Galileo was able to make his discoveries with a telescope of about the same power.
Posted by Phoghat on August 18,2009 | 02:18AM
man if u can help me i really need to know how u make the compas is for a work in the class
Posted by tomato mm on November 25,2009 | 08:26AM