ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Ptolemy with a telescope. Historical artwork of Claudius Ptolemaeus (c.90-c.168), also known as Ptolemy, observing the sky with a telescope. Ptolemy was an astronomer who lived in the Greek culture of Roman Egypt. Image published in 'Iter Germanicum', in 1717.
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