Halo,arcs and sun dogs. 19th-century artwork depicting optical phenomena associated with the Sun (lower centre) and caused by ice crystals in the atmosphere. This is a 22-degree halo,with sun dogs (parhelia) visible as the bright spots on each side of the halo. Three arcs are also visible: a faint one on top of the halo (an upper tangent arc),and two rainbow-like ones at top (a supralateral arc and a circumzenithal arc). These phenomena were observed from Pitea in Sweden,on 4 October 1839. Artwork from 'Cours complete de meteorologie' (1843) by German physicist and meteorologist Ludwig Friedrich Kaemtz (1801-1867) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / King's College London |
Bildgröße: | 2465 px × 3581 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |