绿色闪光的视频
(原标题: Video of a Green Flash)
2021-11-10
浏览次数: 28
许多人认为这只是一个神话。其他人认为这是真的，但其原因尚不清楚。冒险家们以见过它而自豪。那是太阳发出的绿光。事实上，绿光确实存在，其原因也很好理解。就在夕阳完全从视野中消失的时候，最后一丝绿意出现了。这种效果通常只有在地平线较低、较远的地方才能看到，而且只持续几秒钟。太阳升起时也能看到绿色闪光，但需要更好的时间来发现。上个月，在意大利托斯卡纳的利古里亚海，当太阳落山时，一段视频捕捉到了一道引人注目的绿色闪光。在特色视频的第二段中，绿色的闪光是实时的，第一段是加速的，最后一段是慢动作的。太阳本身并没有部分变绿——这种效应是由地球大气层的层像棱镜一样起作用造成的。探索+拓展：APOD研究生研究职位开放
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Many think it is just a myth. Others think it is true but its cause isn't known. Adventurers pride themselves on having seen it. It's a green flash from the Sun. The truth is the green flash does exist and its cause is well understood. Just as the setting Sun disappears completely from view, a last glimmer appears startlingly green. The effect is typically visible only from locations with a low, distant horizon, and lasts just a few seconds. A green flash is also visible for a rising Sun, but takes better timing to spot. A dramatic green flash was caught on video last month as the Sun set beyond the Ligurian Sea from Tuscany, Italy. The second sequence in the featured video shows the green flash in real time, while the first is sped up and the last is in slow motion. The Sun itself does not turn partly green -- the effect is caused by layers of the Earth's atmosphere acting like a prism. Discovery + Outreach: Graduate student research position open for APOD
© Paolo Lazzarotti