Aurora borealis. Coloured ultraviolet (UV) light image showing the distribution of the aurora borealis,or 'northern lights'. UV intensity is colour coded from purple (lowest) through blue,green and yellow to red (highest). This image is remarkable in that it records auroral activity both in the night and day hemispheres; visible light images would be drowned out by reflected sunlight. The main aurora (lower red area) is in the daylight hemisphere,whilst a sub-storm (upper red area) is in night. This image was made using a very narrow-band filter on the UltraViolet Imager (UVI),an instrument on NASA's Polar spacecraft,on 6 April 1996 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / NASA |
Taille de l’image : | 2500 px × 2163 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |