流星尘埃
(原标题: Meteor Dust)
2026-01-12
浏览次数: 2955
这颗流星怎么了？当它穿过地球大气层并升温时，它的外层正在脱落。突如其来的高温不仅使这条引人注目的条纹发出明亮的光芒，而且还融化并蒸发了流星的组成部分岩石和冰，产生了尘埃。大气中的风通常会在接下来的几秒钟内将这些尘埃吹走，几分钟后就不会留下任何可见的痕迹。这些尘埃中的大部分最终会落在地球上。这张特色图片是在12月中旬拍摄的，与双子座流星雨同时发生。左上角是夜空中最亮的星星天狼星，而前景是被雾笼罩的黄山，中国东部的黄山。
查看原文解释
What's happening to this meteor? It is shedding its outer layers as it passes through the Earth's atmosphere and heats up. The sudden high temperatures not only cause the bright glow along the dramatic streak but also melt and vaporize the meteor's component rock and ice, creating dust. Wind in the atmosphere typically blows this dust away over the next few seconds, leaving no visible trace after only a few minutes. Much of this dust will eventually settle down to the Earth. The featured image was captured in mid-December, coincident with the Geminids meteor shower. On the upper left is Sirius, the brightest star in the night sky, while in the foreground is fog-engulfed Huangshan, the Yellow Mountains of eastern China.
© Xu Chen