Galileo's TelescopesIn 1609, Galileo saw a telescope made by a Dutch spectacle maker. He immediately began making his own. His telescopes were simple arrangements of two lenses held apart by wooden tubes, a metre or so long.
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![]() Two of Galileo's telescopes tied to an observing pole. Mounted in the ornate frame below is an objective lens from one of Galileo's telescopes. It is about 50 mm in diameter. Project Galileo, Rice University |