Observations of sunspots,May 1644. On right is a large spot which is shown in a series of successive positions due to the Sun's rotation. From Selenographia by Johannes Hevelius (Gedani,Gdansk,Danzig,1647). Engraving | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / UIG / Universal History Archive |
Bildgröße: | 2969 px × 2951 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |