落日上的AR 3664
在水面上和前景树木之间可以看到远处的太阳。太阳的下部是巨大的活跃区AR 3664可见的黑暗的太阳黑子。有关更多详细信息，请参阅说明。
sunspots
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
天文·每日一图
活跃太阳的黑子
2023年7月11日 Sunspots on an Active Sun Image Credit: NASA, SDO; Processing & Copyright: Şenol Şanlı Explanation: Why is our Sun so active now? No one is sure. An increase in surface activity was expected because our Sun is approaching solar maximum in 2025. However, last month our Sun sprouted mo
天文·每日一图
山丘与带斑的太阳
2021年9月21日 Sun Spot Hill Image Credit & Copyright: Jordi Coy Explanation: Is this giant orange ball about to roll down that tree-lined hill? No, because the giant orange ball is actually the Sun. Our Solar System’s central star was captured rising beyond a hill on Earth twelve days ago co