2025年8月26日
A Leaky Solar Prominence
Video Credit & Copyright: Andrea Girones
Explanation: What’s hovering above the Sun? A solar prominence. A prominence is a crest of hot gas expelled from the Sun’s surface that is held aloft by the Sun’s magnetic field. Prominences can last for days, can suddenly explode into space, or just fall back to the Sun. What decides a prominence’s fate is how the Sun’s complex magnetic field changes — the field’s direction can act like an offramp for trapped solar particles. The 3-second (repeating) time-lapse featured video was captured earlier this month from Ottawa, Ontario, Canada. It shows the development of a larger-than-Earth prominence as it appears to leak solar plasma back to the Sun, over the course of an hour. What is unusual is that the prominence appears to hover — more simple and typical prominences form magnetic loops that connect back to the surface. Many hours after this video ended, the hovering prominence disintegrated back into the Sun.
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泄漏的太阳日珥
视频提供与版权: Andrea Girones
说明: 太阳上方漂浮的是什么？是日珥。日珥是从太阳表面喷出的炙热气体峰顶，被太阳的磁场支撑在高空。日珥可以持续数天，可能会突然爆发进入太空，或者只是回落到太阳。决定日珥命运的是太阳复杂磁场的变化-磁场的方向就像是为被捕获的太阳粒子提供一个出口。这段3秒钟（重复播放）的缩时影片是本月早些时候在加拿大 安大略省的渥太华所拍摄的。影片展示了一个比地球还大的日珥之形成过程，在一小时内，它似乎将太阳电浆泄露回太阳。不寻常的是，这个日珥看起来像是悬浮在空中-更简单、更典型的日珥会形成磁环，连接回表面。这段影片结束后数小时，这个悬浮的日珥解体回到太阳中。
