Aurora Borealis 19th century engraving
Bildnummer 11960087
| A 19th century engraving of the Aurora Borealis. An aurora,sometimes referred to as a polar light,is a natural light display in the sky,predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma,mainly in the form of electrons and protons,precipitate them into the upper atmosphere,where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora,occurring within bands around both polar regions,is also dependent on the amount of acceleration imparted to the precipitating particles | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Parker, David |
| Bildgröße: | 4985 px × 6810 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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