Greek Astronomer Studying the Stars, illustration from Book 1 Part 5 Chapter 17 of 'The Principles of Philosophy' by Anthony Le Grand, engraving by Johannes Kip (1652/3-1722), 1694 (engraving), G. Freman (fl. 17th century). The earliest recorded working telescopes were the refracting telescopes that appeared in the Netherlands in 1608.

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