APOD250806 星系前方的流星 - 天文(Astronomy)版

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APOD250806 星系前方的流星

CelestiaAstromm 2026-01-01 20:03:05

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星系前方的流星

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图像提供与版权： Fritz Helmut Hemmerich[1]

英文原文:Explanation: What's that green streak in front of the Andromeda galaxy? A meteor. While photographing the Andromeda galaxy in 2016, near the peak of the Perseid Meteor Shower , a small pebble from deep space crossed right in front of our Milky Way Galaxy 's far-distant companion. The small meteor took only a fraction of a second to pass through this 10-degree field. The meteor flared several times while braking violently upon entering Earth's atmosphere . The green color was created, at least in part, by the meteor's gas glowing as it vaporized. Although the exposure was timed to catch a Perseid meteor , the orientation of the imaged streak seems a better match to a meteor from the Southern Delta Aquariids , a meteor shower that peaked a few weeks earlier. Not coincidentally, the Perseid Meteor Shower peaks next week, although this year the meteors will have to outshine a sky brightened by a nearly full moon. 说明：那道在仙女座星系前方的绿色光迹是什么？那是一颗流星。在2016年拍摄仙女座星系[2]时，正值英仙座[3]流星[4]雨[5]高峰期，一颗来自深太空的小石子正好掠过[6]我们银河系[7]的遥远伴星系的前方。这颗小流星[8]用不到一秒的时间就穿过了这片10度宽的视野。流星在高速进入地球大气层[9]后，出现数次闪燃发光[10]。这道绿色光芒[11]至少部分是由于流星在汽化成气体发光所致。虽然曝光时间[12]的设置是为了捕捉英仙座流星[13]，但图像中流星迹的方向似乎更符合来自南三角座流星雨[14]的流星，而这群流星雨[15]则在几周前达到高峰。无独有偶，英仙座流星雨[16]将在下周达到高峰，然而今年[17]的流星将不得不与几乎满月的明亮夜空[18]争辉。