1608
Invention of the telescope. Claimed by Dutch lensmaker Hans Lippershey, although others (including Jacob Metius and Zacharias Janssen) are also sometimes credited.
Galileo’s Telescope | Source: Istituto e Museo di Storia Della Scienza GALILEO’S TELESCOPE | Istituto e Museo di Storia Della Scienza
1609
Galileo improves the telescope and begins using it for astronomy, starting with lunar observations.
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