Hooke's telescopes. 17th-century engraving with labelled diagrams showing telescope equipment and mechanisms described by English scientist Robert Hooke (1635-1703). The diagrams include eight variant optical arrangements devised by Hooke for shortening telescopes (across top) and a micrometer instrument (across bottom). The telescope arrangements show light rays being reflected by various mirrors inside the telescope tub before reaching the observer's eye. At bottom left is a universal joint. This is plate 1 from Hooke's 'A Description of Helioscopes' (1676) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Royal Astronomical Society |
Bildgröße: | 4965 px × 3570 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |