銀河系前的流星
Meteor before Galaxy
來源：Fritz
Helmut Hemmerich｜發表日期：2025-08-06
仙女座星系前面的綠色條紋是什麼？一顆流星。 2016 年，在拍攝仙女座星系時，接近英仙座流星雨的高峰期，一顆來自太空深處的小石子正好從銀河系遙遠的伴星系前方劃過。這顆小流星只用了幾分之一秒就穿過了這個 10 度的區域。 這顆流星在進入地球大氣層後猛地剎車，併發出了幾次耀斑。 綠色的產生，至少部分是由於流星的氣體在蒸發時發光。雖然這次曝光的時間是為了捕捉英仙座流星，但成像條紋的方向似乎更像是南三角洲水瓶座流星雨的流星，該流星雨在幾周前達到頂峰。 無獨有偶，英仙座流星雨也將在下週達到頂峰，不過今年的流星要比接近滿月的天空更加明亮。
原文：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.
※ 本文由萌芽機器人自動轉貼自每日一天文圖（Astronomy Picture of the Day，APOD），原文為英文，正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理，內容僅供參考，若有任何錯誤之處還請見諒！
關於每日一天文圖：每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務，網站每天提供一張影像或圖片，並由天文學家撰寫扼要說明其特別之處。