Solar activity. False-colour image of the Sun made in 'soft' X-rays (250-3000 electron Volt energy),showing intense coronal activity. The brightness of the image is proportional to the X-ray intensity. Especially active regions are seen at low latitudes (typically 10-20 degrees north and south of the solar equator). Regions of high X-ray emission are often associated with sunspots,the localised intense magnetic field causing a concentration of the ionised material responsible for X-ray emission. The data for this image were gathered at 19:17UT on 15 September 1991 by the Japanese Yohkoh ("Sun-ray") astronomical satellite | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Jisas / Lockheed |
Taille de l’image : | 3937 px × 4001 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |