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流星解体时化学物质发光

(原标题: Chemicals Glow as a Meteor Disintegrates)

2023-07-24

浏览次数: 20

流星可以是彩色的。虽然人眼通常不能分辨许多颜色,但相机通常可以。这张照片是一个火球,一颗解体的流星,它不仅是摄影师见过的最亮的流星之一,而且色彩斑斓。这颗流星是7月中旬在奥地利Hochkar山上用相机拍摄银河系中央带时偶然捕捉到的。这些发光的沙砾很可能是很久以前被彗星或小行星抛下的,不幸地进入了地球的大气层。流星的颜色通常来自流星分解时释放的电离化学元素,其中蓝绿色通常来自镁,钙辐射紫色,镍发出绿色。然而,红色通常来自地球大气中充满活力的氮和氧。这颗明亮的流星火球在不到一秒的时间内瞬间消失,但它留下了一条被风吹走的电离痕迹,在近一分钟的时间里仍然可见。

查看原文解释

Meteors can be colorful. While the human eye usually cannot discern many colors, cameras often can. Pictured here is a fireball, a disintegrating meteor that was not only one of the brightest the photographer has ever seen, but colorful. The meteor was captured by chance in mid-July with a camera set up on Hochkar Mountain in Austria to photograph the central band of our Milky Way galaxy. The radiant grit, likely cast off by a comet or asteroid long ago, had the misfortune to enter Earth's atmosphere. Colors in meteors usually originate from ionized chemical elements released as the meteor disintegrates, with blue-green typically originating from magnesium, calcium radiating violet, and nickel glowing green. Red, however, typically originates from energized nitrogen and oxygen in the Earth's atmosphere. This bright meteoric fireball was gone in a flash -- less than a second -- but it left a wind-blown ionization trail that remained visible for almost a minute.

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