3 I ATLAS:星際彗星的尾巴
3I ATLAS: Tails of an Interstellar Comet

來源:Victor Sabet &
Julien De Winter|發表日期:2025-12-01
我們的太陽系有多典型? 對 3 I/ATLAS 這顆剛剛經過的彗星的研究提供了線索。 已經證實的星際訪客包括一顆小行星、一顆彗星、一顆流星以及以氫和氦為主的氣體風。與太陽系彗星相比, 3 I/ATLAS 彗星顯得相對正常,因此提供了更多證據,證明我們的太陽系是一個有點典型的恆星系統。 例如, 3 I/ATLAS 彗星的化學成分和噴射出的塵埃大致相似。這張特寫圖片是上週從德克薩斯州拍攝的,顯示了綠色的彗星彗尾、可能被太陽風偏轉的飄忽不定的藍色離子尾以及輕微的反尾,這些都是典型的彗星特徵。 這顆彗星用望遠鏡就能看到,它在 10 月下旬越過了離太陽最近的位置,並將在 12 月中旬越過離地球最近的位置,之後它將返回星際空間,再也不會回來。 探索宇宙隨機 APOD 生成器
原文:How typical is our Solar System? Studying 3I/ATLAS, a comet just passing through, is providing clues. Confirmed previous interstellar visitors include an asteroid, a comet, a meteor, and a gas wind dominated by hydrogen and helium. Comet 3I/ATLAS appears relatively normal when compared to Solar System comets, therefore providing more evidence that our Solar System is a somewhat typical star system. For example, Comet 3I/ATLAS has a broadly similar chemical composition and ejected dust. The featured image was captured last week from Texas and shows a green coma, a wandering blue-tinted ion tail likely deflected by our Sun's wind, and a slight anti-tail, all typical cometary attributes. The comet, visible with a telescope, passed its closest to the Sun in late October and will pass its closest to the Earth in mid-December, after which it will return to interstellar space and never return. Explore the Universe: Random APOD Generator
※ 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。