Sunspot,computer model. Sunspots are cooler regions of the Sun's surface that appear dark against their brighter,hotter surroundings. They are concentrations of magnetic field and comprise a dark umbra (centre) surrounded by lighter radial filaments,the penumbra. This model,based on a pair of sunspots,shows that the radial filaments result from hot plasma being guided outwards by a strong magnetic field with an inclination to the vertical exceeding 45 degrees. In this image a zero degree inclination angle of the magnetic field is black,going through red,orange and yellow to an inclination angle of 90 degrees,which is white | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / UNIVERSITY CORPORATION FOR ATMOSPHERIC RESEARCH |
Bildgröße: | 2959 px × 2953 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |