Category:Aerial telescopes
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very long focal length refracting telescope without a tube, built in the 17th century; the objective was mounted on a pole, tree, etc. on a swivel ball-joint; the observer stood on the ground and maneuvered the eyepiece to aim at celestial objects  | |||||
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Media in category "Aerial telescopes"
The following 12 files are in this category, out of 12 total.
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Gdansk obserwatorium Heweliusza 1640.jpg 945 × 437; 90 KB
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Hevels Riesenteleskop,Danzig-41.66c.JPG 1,583 × 1,471; 787 KB
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Houghton Typ 620.73.451 - Johannes Hevelius, Machinae coelestis, 1673.jpg 4,635 × 3,879; 6.35 MB
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Huygens Aerial telescope 04, 2014.jpg 1,920 × 2,560; 2.4 MB
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Huygens Aerial telescope Leiden, 2014.jpg 2,100 × 1,400; 1.97 MB
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Huygens Aerial telescope, 1684, retouch II.jpg 1,003 × 1,273; 237 KB
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Huygens Aerial telescope, 1684, retouch.jpg 1,003 × 1,273; 306 KB
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Huygens Aerial telescope, 1684.jpg 1,003 × 1,273; 197 KB
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Makieta obserwatorium astronomicznego Heweliusza w Gdańsku.JPG 4,000 × 3,000; 3.94 MB
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Paris Observatory XVIII century.png 580 × 392; 179 KB
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Telescope 140 foot Johann Hevelius.jpg 837 × 700; 165 KB
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Voyage in Space page090.jpg 1,210 × 1,660; 263 KB
