色彩缤纷的四分仪流星

2021年02月02日

A Colorful Quadrantid Meteor
Image Credit & Copyright: Frank Kuszaj

Explanation: Meteors can be colorful. While the human eye usually cannot discern many colors, cameras often can. Pictured is a Quadrantids meteor captured by camera over Missouri, USA, early this month that was not only impressively bright, but colorful. The radiant grit, likely cast off by asteroid 2003 EH1, blazed a path across Earth’s atmosphere. Colors in meteors usually originate from ionized 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 several minutes.

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Tomorrow’s picture: moon rock roll

色彩缤纷的四分仪流星
影像提供与版权: Frank Kuszaj

说明: 流星的色泽可以很缤纷。虽然人类的眼睛无法分办太多色泽，但相机通常可以。上面这幅影像，呈现了位在美国．密苏里州的相机，在这个月稍早所记录的一颗明亮多彩的四分仪流星。这颗可能源自小行星2003 EH1的小碎片，在地球大气中曳出一道长长的流星痕。流星的色彩通常来自流星分解时所释放的激发态元素，蓝绿色泽的光通常来自镁、紫光来自钙、与及绿光源自镍。不过，红光则通常是由地球大气中的激发态氮和氧所发出。这颗转瞬即逝的火 流星持续不到1秒，然而它在风中飘飞的电离流星痕，可见的期间绵延了数分钟。

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明日的图片: moon rock roll