Aurora Borealis or Northern Lights observed from the Isle of Sky, Scotland, 11 September 1874. Caused by high-speed particles ejected from the Sun, they are most commonly observed during periods of maximum sunspots. From "Die Naturkrafte" by M Wilhelm Meyer (Leipzig, 1903). Chromolithograph.

---

Size: 3543px × 2603px
Location:
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, 20th, arch, beautiful, camp, century, engraving, fire, light, natural, night, observation, observing, people, phenomenon, radiating, sea, shining, stars, watching