精灵闪电高清晰度
(原标题: Sprite Lightning in High Definition)
2023-10-02
浏览次数: 9
有时闪电发生在太空附近。其中一种闪电是红色精灵闪电，在过去的25年里，人们才在地球上拍摄和研究过这种闪电。所有类型闪电的起源仍然是研究的主题，科学家们仍在试图弄清楚为什么红色精灵闪电会发生。研究表明，在强烈的云层对地面的正面雷击之后，红色精灵可能会以100米高的电离空气球的形式开始，以10%的光速从80公里高的地方射下来。紧随其后的是一组向上条纹化的电离球。这里展示的是一群红色精灵的高分辨率图像。这张照片是大约三周前在法国多尔多涅的卡斯泰尔诺城堡拍摄的一段视频，只有1/25秒。精灵很快就消失了——即使在下一帧视频中也看不到精灵。
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Sometimes lightning occurs out near space. One such lightning type is red sprite lightning, which has only been photographed and studied on Earth over the past 25 years. The origins of all types of lightning remain topics for research, and scientists are still trying to figure out why red sprite lightning occurs at all. Research has shown that following a powerful positive cloud-to-ground lightning strike, red sprites may start as 100-meter balls of ionized air that shoot down from about 80-km high at 10 percent the speed of light. They are quickly followed by a group of upward streaking ionized balls. Featured here is an extraordinarily high-resolution image of a group of red sprites. This image is a single frame lasting only 1/25th of a second from a video taken above Castelnaud Castle in Dordogne, France, about three weeks ago. The sprites quickly vanished -- no sprites were visible even on the very next video frame.
© Nicolas Escurat