Hevelius observing with a wooden-tubed refracting telescope some 30 feet (). The block-and-tackle and rope mounting was not inconvenient. From S

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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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Size: 3137px × 2793px
Photo credit: © Universal History Archive/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 144m, 30, 1647, astronomer, astronomy, block--tackle, danzig, engraving, feet, gdansk, gedani, hevelius, inconvenient, instrument., johannes, mounting, observing, refracting, rope, science, scientific, scientist, selenographia, telescope, wooden-tubed