/johannes-kepler-with-king-rudolf-ii-961956148-75fd06a5ce6843668ec97a5c30ca9a12.jpg "Biography of Johannes Kepler, Pioneering Astronomer")
Biography of Johannes Kepler, Pioneering Astronomer
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Engraving depicting a refracting telescope on an iron stand and fitted with a finder. The instrument has two double convex lenses and is known as the astronomical telescope. Dated 19th Century Stock
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