Sunspots (dark areas) on the surface of the Sun. Sunspots are areas of magnetic activity that are cooler than the rest of the Sun's surface. They range in size from hundreds to thousands of kilometres across. The darkest regions (nearly vertical magnetic fields) are the umbras,surrounded by penumbras (bronze regions). The yellow background consists of convection cells called solar granules,each around 1000 kilometres across. This group (AR 1785) was one of the largest observed in 2013. This image was obtained with a Baader white light filter on 6 July 2013 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Peach, Damian |
Taille de l’image : | 5968 px × 2979 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |