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Telescope invented by Hans Lippershey, Zacharrias Janssen, and Jacob Metius who were spectacle makers from Middelburg
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Galileo builds a telescope within a month of hearing about the new invention and improves the telescope.
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Johannes Kelper creates the convex lens
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John Hadley invented this.
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This made it so the telescope can see farther and clearer.by Chester Moore Hall
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Greatly improves the clarity of the telescope.by Leon Foucalt
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Kyle Guth Jansky;s invention
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Better clarity and distance at which it can see.