日冕环

Four images of the Sun’s edge are shown. In each a loop of bright material is captured above the Sun’s surface. Please see the explanation for more detailed information.
图中展示了四张太阳边缘的图像。每张图像都捕捉到了太阳表面上方一个明亮的日冕环。有关更多详细信息，请参阅说明。