冰岛上空的螺旋极光
(原标题: A Spiral Aurora over Iceland)
2021-09-12
浏览次数: 43
天空怎么了？极光!这幅极光拍摄于2015年，冰岛人注意到它的明亮和快速发展。极光是由太阳风暴引起的，几天后，高能粒子从太阳中爆发出来，穿过地球保护磁层的裂缝。虽然螺旋形图案可以辨别，但有创造力的人可能会把这种复杂的辉光想象成任何数量的常见图标的大气幽灵。在特色图像的前景是Ölfusá河，而灯光照亮了塞尔福斯市的一座桥。低低的云层后面是一轮近乎满月的月亮。随着太阳从太阳极小期（历史上11年周期中的平静期）出现，太阳的活跃度——以及由此产生的地球极光——正在缓慢增加。
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What's happened to the sky? Aurora! Captured in 2015, this aurora was noted by Icelanders for its great brightness and quick development. The aurora resulted from a solar storm, with high energy particles bursting out from the Sun and through a crack in Earth's protective magnetosphere a few days later. Although a spiral pattern can be discerned, creative humans might imagine the complex glow as an atmospheric apparition of any number of common icons. In the foreground of the featured image is the Ölfusá River while the lights illuminate a bridge in Selfoss City. Just beyond the low clouds is a nearly full Moon. The liveliness of the Sun -- and likely the resulting auroras on Earth -- is slowly increasing as the Sun emerges from a Solar minimum, a historically quiet period in its 11-year cycle.
© Davide Necchi