5 The Invention of the Telescope Always Keep Your Eyes Open

An extreme example of people keeping their eyes closed (literally and figuratively) was the simple experiment that led to the invention of the telescope and microscope. It took more than 300 years after eyeglasses were in common use before Hans Uppershey, in 1608, observed the joint magnifying action of two lenses, built a simple telescope and then took action to publish his findings! Shortly afterwards Galileo applied the telescope to the study of the planets and quickly discovered that the "facts" of classical philosophy were wrong. When he invited the scholars of the day to look through his telescope and see for themselves they refused! G5G5

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