冰岛瀑布上的彩虹极光
(原标题: Rainbow Aurora over Icelandic Waterfall)
2023-12-27
浏览次数: 12
是的，但你的极光能做到吗？首先，是的，极光看起来像彩虹，尽管它们是完全不同的现象。极光是由太阳产生的粒子被地球磁场引导到地球大气层中，并通过激发不同高度的原子而产生颜色。相反，彩虹是由阳光被落下的雨滴反向散射而形成的，不同的颜色被稍微不同的角度折射而成。不幸的是，极光不能形成瀑布，但如果你计划得当并且足够幸运，你可以把它们一起拍下来。这张特色照片是去年11月在冰岛Skógafoss瀑布附近拍摄的几张照片组成的。计划的重点是在风景如画的瀑布上捕捉我们银河系的中央带。幸运的是，壮观的极光很快就出现在银河系弯曲的拱门下方。在远处的背景中，可以找到昴宿星团和仙女座星系。你的天空惊喜：APOD在你的生日上展示了什么照片？(1995后)
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Yes, but can your aurora do this? First, yes, auroras can look like rainbows even though they are completely different phenomena. Auroras are caused by Sun-created particles being channeled into Earth's atmosphere by Earth's magnetic field, and create colors by exciting atoms at different heights. Conversely, rainbows are created by sunlight backscattering off falling raindrops, and different colors are refracted by slightly different angles. Unfortunately, auroras can’t create waterfalls, but if you plan well and are lucky enough, you can photograph them together. The featured picture is composed of several images taken on the same night last November near the Skógafoss waterfall in Iceland. The planning centered on capturing the central band of our Milky Way galaxy over the picturesque cascade. By luck, a spectacular aurora soon appeared just below the curving arch of the Milky Way. Far in the background, the Pleiades star cluster and the Andromeda galaxy can be found. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
© Stefano Pellegrini