"Four hundred years ago Galileo gave birth to modern astronomy with the humblest of instruments, now preserved at a history of science museum in Florence, Italy. A one-and-a-half-inch lens displayed in an ornate frame was ground in 1609. Other followed. Fitted into simple wooden tubes just a few feet long, Galileo's lenses magnified the heavens, bringing Earth's moon, sunspots, and nearby planets into focus."i highly suggest checking out the telescope timeline that national geographic is also featuring.
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