Aurora borealis. A fisheye lens long exposure photograph of a yellow-green aurora borealis (Northern Lights) display; also visible are star trails. Aurorae can be smoky black to flaming red in colour. Aurorae are caused by the interaction between energetic charged particles from the Sun and gas molecules in the upper atmosphere (about 100 kilometres up). On reaching Earth the charged particles are drawn by Earth's magnetic field to the poles,where they collide with the upper atmosphere. Star trails are caused by star's apparent movement across the sky due to the rotation of the Earth. Photographed in Finland | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / PEKKA PARVIAINEN |
Taille de l’image : | 5059 px × 3531 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |