Total solar eclipse. The large shining corona of the Sun,seen during the total solar eclipse of 11 July 1991 from Baja California,Mexico. The visible corona is in fact the overlapping K-corona and F-corona. Usually it is only visible during eclipses,as the light from the Sun's photosphere drowns it out. The K-corona consists of fast- moving free electrons at a temperature of about 2 million Kelvin,at heights of about 75,000km above the Sun's surface. The F-corona extends for many million km's,and consists mainly of slow-moving particles of cosmic dust. The shape of the corona changes during the cycle of solar activity under the influence of the Sun's magnetic field | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / REV. RONALD ROYER |
Bildgröße: | 3317 px × 4463 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |