太阳轨道飞行器（Solar Orbiter）近日捕获的一张太阳全貌图中，展示了有史以来最大的日珥（Solar Prominence）喷发。日珥是太阳磁场剧烈活动的结果，它使密集的太阳等离子体悬浮在太阳表面之上，有时采取拱形环的形式。
它们通常与日冕物质抛射有关，如果直接射向地球，会对我们的技术和日常生活造成严重破坏。
最近一次日珥发生于 2022 年 2 月 15 日，覆盖范围延伸到数百万公里的空间。幸运的是，本次日冕物质抛射并不是针对地球的，而且正在远离我们。目前太阳轨道飞行器正在接近地日线，而在在面向航天器的太阳圆盘上没有爆发的迹象，这意味着本次日珥是源自太阳远离我们的一面。
太阳轨道飞行器（Solar Orbiter）是欧洲空间局（ESA）和美国国家航空航天局（NASA）联合研制的太阳探测器，是近年来继帕克太阳探测器后NASA对内层太阳系的第二次探测任务。该探测器将利用金星和地球的引力脱离黄道面，首次提供太阳两极的图像。
该图像是由太空轨道器上极端紫外线成像器（EUI）的“全日成像器”（FSI）拍摄的。FSI 在设计之初就用于观察整个太阳盘，即使在接近太阳的过程（比如下个月即将到来的近日点通过期间）中也能纳入整个视野里。
在 3 月 26 日最接近时，航天器将在大约 0.3 倍的日地距离内通过，太阳将占据望远镜视野的更大部分。现在，圆盘周围仍然有很多”观察余地”，使 FSI 能够捕捉到大约 350 万公里以内的惊人细节，相当于太阳半径的 5 倍。
其他空间望远镜，如欧空局/美国宇航局的SOHO卫星经常看到这样的太阳活动，但要么离太阳更近，要么通过遮挡器更远，遮挡住太阳圆盘的强光，以实现日冕本身的详细图像。因此，太阳轨道器观察到的突出物是有史以来最大的此类事件，它与太阳圆盘一起被捕捉到，为首次看到像这样的事件与太阳圆盘的联系提供了新的可能性。
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