Hevelius observing with a wooden-tubed refracting telescope some 30 feet (). The block-and-tackle and rope mounting was not inconvenient. From 'Selenographia' by Johannes Hevelius (Gedani, Gdansk. Danzig, 1647). Engraving.
Hevelius observing with a wooden-tubed refracting telescope some 30 feet (). The block-and-tackle and rope mounting was not inconvenient. From 'Selenographia' by Johannes Hevelius (Gedani, Gdansk. Danzig, 1647). Engraving.
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: (gedani, ., 1647)., 30, archival, archive, astronomer, astronomy, block--tackle, danzig, engraving., feet, gdansk., hevelius, historical, history, inconvenient., instrument, johannes, mounting, observing, refracting, rope, science, scientific, scientist, selenographia, telescope, wooden-tubed
