Refracting telescope without a tube, designed by Christiaan Huyghens c1650. From an edition of his 'Opera Varia', 1724. Engraving

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1724., archival, archive, astronomy, c1650., christiaan, designed, edition, engraving, historical, history, huyghens, instrument, opera, optics, refracting, science, telescope, tube, varia