William Herschel's 40 foot reflecting telescope, 19th century illustration. Copperplate engraving from the Encyclopaedia Londinensis, or Universal Dictionary of Arts, Sciences, and Literature; Volume XVII; Edited by Wilkes, John. Published in 1820. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Photostock-Israel |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |