大螺旋 NGC 5643
Grand Spiral NGC 5643
發表日期:2024-12-26
從正面看,大螺旋星系 NGC 5643 在這幅色彩斑斕的宇宙畫卷中顯得格外喜慶。這個星系距離地球大約 5500 萬光年,延伸超過 10 萬光年,在南邊的狼牙星座範圍內可以看到。在這張哈勃太空望遠鏡影像資料的合成照片中,星系內部 4 萬光年的細節清晰可見。銀河系壯麗的旋臂從淡黃色的中心區域蜿蜒而出,中心區域主要是來自老恆星的光線,而旋臂本身則被塵埃通道、年輕的藍色恆星和淡紅色的恆星形成區域所追蹤。眾所周知,NGC 5643 明亮緊湊的核心也是射電波和 X 射線的強發射器。事實上,NGC 5643 是最接近賽弗類活動星系的例子之一,大量的塵埃和氣體被認為正在落入一箇中心大質量黑洞。
原文:Viewed face-on, grand spiral galaxy NGC 5643 has a festive appearance in this colorful cosmic portrait. Some 55 million light-years distant, the galaxy extends for over 100,000 light-years, seen within the boundaries of the southern constellation Lupus. Its inner 40,000 light-years are shown in sharp detail in this composite of Hubble Space Telescope image data. The galaxy's magnificent spiral arms wind from a yellowish central region dominated by light from old stars, while the spiral arms themselves are traced by dust lanes, young blue stars and reddish star forming regions. The bright compact core of NGC 5643 is also known as a strong emitter of radio waves and X-rays. In fact, NGC 5643 is one of the closest examples of the Seyfert class of active galaxies, where vast amounts of dust and gas are thought to be falling into a central massive black hole.
※ 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。