极光冕
See Explanation. Clicking on the picture will download the highest resolution version available.
请参阅说明。单击图片将下载可用的最高分辨率版本。
Solar Maximum
天文·每日一图
太阳极小期与太阳极大期
2023年12月11日 Solar Minimum versus Solar Maximum Video Credit: NASA, SDO, SVS Explanation: The surface of our Sun is constantly changing. Some years it is quiet, showing relatively few sunspots and active regions. Other years it is churning, showing many sunspots and throwing frequent Coronal Mass Eje