冰岛瀑布上五彩缤纷的极光
(原标题: Colorful Aurora over Icelandic Waterfall)
2026-08-27
浏览次数: 1533
当冰岛Skógafoss瀑布上的夜空变得五彩缤纷时，这是多么壮观的景象啊！这张照片是摄影师在2025年4月用5秒曝光拍摄的。看到极光是许多人的遗愿清单。但这并不容易。它需要高太阳活动，黑暗和晴朗的天空，通常在高纬度的观测地点。这使得北极光比相应的南极光更容易被看到，原因很简单，因为南半球的陆地较少，尤其是在南极圈周围。极光是由太阳风中的带电粒子引起的，这些带电粒子被地球的磁层捕获，并被磁场引导到一个靠近两极的区域，在那里它们与大气中的气体粒子发生碰撞。不同的颜色表示与不同高度的不同气体的相互作用，如氧气（红色和绿色）和氮气（蓝色和粉红色）。APOD的主要NASA网站正在迁移：从APOD . NASA .gov到science.nasa.gov/apod
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What a sight to behold, when a night sky became filled with colors that appeared to rain over the Skógafoss waterfall in Iceland. This image was taken in a single 5 second exposure by the photographer in April 2025. Seeing an aurora is on many people's bucket lists. But it is not easy. It requires high solar activity, dark and clear skies, and usually a viewing location at high latitude. That makes the northern lights more easily seen than the corresponding southern lights, simply because there is less landmass in the Southern Hemisphere, especially around the Antarctic Circle. Auroras are caused by charged particles from the solar wind that are captured by the Earth's magnetosphere and guided by the magnetic field to a region close to one of the poles, where they collide with gas particles in the atmosphere. Different colors indicate interactions with different gases at different altitudes, like oxygen (red and green) and nitrogen (blue and pink). APOD's main NASA site is moving : From apod.nasa.gov to science.nasa.gov/apod
© Victor Lima Text: Cecilia Chirenti (NASA GSFC, UMCP, CRESST II)