NGC 3521 :氣泡中的星系
NGC 3521: Galaxy in a Bubble

來源:Vikas Chander|發表日期:2025-06-19
華麗的螺旋星系 NGC 3521 位於距地球僅 3500 萬光年遠的地方,即春季北部的獅子座。NGC 3521 在地球天空中相對較亮,在小型望遠鏡中很容易看到,但經常被業餘愛好者忽略,而被其他獅子座螺旋星系(如 M 66 和 M 65 )所吸引。不過,在這幅色彩斑斕的宇宙畫卷中,它很難被忽視。這個星系的跨度大約有 5 萬光年,它的螺旋臂呈不規則的斑塊狀,上面佈滿了塵埃、粉紅色的恆星形成區以及年輕的藍色恆星群。深層影像還發現 NGC 3521 嵌入了更暗的巨大氣泡狀外殼。這些外殼很可能是潮汐碎片,是從遙遠的過去與 NGC 3521 發生合併的衛星星系中撕裂出來的恆星流。
原文:Gorgeous spiral galaxy NGC 3521 is a mere 35 million light-years away, toward the northern springtime constellation Leo. Relatively bright in planet Earth's sky, NGC 3521 is easily visible in small telescopes but often overlooked by amateur imagers in favor of other Leo spiral galaxies, like M66 and M65. It's hard to overlook in this colorful cosmic portrait though. Spanning some 50,000 light-years the galaxy sports characteristic patchy, irregular spiral arms laced with dust, pink star forming regions, and clusters of young, blue stars. The deep image also finds NGC 3521 embedded in fainter, gigantic, bubble-like shells. The shells are likely tidal debris, streams of stars torn from satellite galaxies that have undergone mergers with NGC 3521 in the distant past.
※ 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。