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Guest post: The “First” Great Telescope: the Great Dorpat Refractor in Tartu's Old Observatory | 10 Minute Astronomy
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A Merz, Utzschneider & Fraunhofer Marine Telescope - Antique Scientific Instruments, Globes and Cameras 2018/09/13 - Realized price: EUR 2,125 - Dorotheum
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Fraunhofer Telescope Photograph by Royal Astronomical Society/science Photo Library - Fine Art America
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