冰岛上空的龙极光
(原标题: Dragon Aurora over Iceland)
2024-01-14
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你见过天空中的龙吗？虽然真正的飞龙并不存在，但2019年冰岛上空出现了巨大的龙形极光。极光是由太阳日冕上的一个洞引起的，这个洞将带电粒子喷射到太阳风中，太阳风随着行星际磁场的变化进入地球磁层。当其中一些粒子撞击地球大气层时，它们激发了原子，随后发出光：极光。这个标志性的展示是如此迷人，以至于摄影师的母亲跑出去看，并在前景中被捕捉到。随着2025年太阳活动极大期的临近，活跃的太阳继续呈现出异常多的日珥、细丝、太阳黑子和大型活动区。
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Have you ever seen a dragon in the sky? Although real flying dragons don't exist, a huge dragon-shaped aurora developed in the sky over Iceland in 2019. The aurora was caused by a hole in the Sun's corona that expelled charged particles into a solar wind that followed a changing interplanetary magnetic field to Earth's magnetosphere. As some of those particles then struck Earth's atmosphere, they excited atoms which subsequently emitted light: aurora. This iconic display was so enthralling that the photographer's mother ran out to see it and was captured in the foreground. Our active Sun continues to show an unusually high number of prominences, filaments, sunspots, and large active regions as solar maximum approaches in 2025.
© Jingyi Zhang & Wang Zheng