光、暗、塵三叉戟
The Light, Dark, and Dusty Trifid
來源:Robert Edelmaier and Gabriele Gegenbauer|發表日期:2024-08-10
Messier 20 ,俗稱三葉星雲,位於大約 5000 光年遠的星雲豐富的人馬座方向。三葉星雲是銀河系平面上的一個恆星形成區,它展示了三種不同型別的天文星雲:由氫原子發出的光主導的紅色發射星雲,由反射星光的塵埃產生的藍色反射星雲,以及濃密塵埃雲呈現剪影的暗星雲。紅色發射區被遮蔽的塵埃道大致分成三部分,這就是三葉星雲的俗名。這個宇宙雲團的直徑超過 40 光年,相當於地球天空中一輪滿月的面積。但是三葉星雲太暗了,無法用肉眼看到。我們利用在漆黑夜空中捕捉到的超過 75 小時的影像資料,製作出了這一令人驚歎的望遠鏡檢視。 觀看:英仙座流星雨
原文:Messier 20, popularly known as the Trifid Nebula, lies about 5,000 light-years away toward the nebula rich constellation Sagittarius. A star forming region in the plane of our galaxy, the Trifid does illustrate three different types of astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark nebulae where dense dust clouds appear in silhouette. The reddish emission region, roughly separated into three parts by obscuring dust lanes, is what lends the Trifid its popular name. The cosmic cloud complex is over 40 light-years across and would cover the area of a full moon on planet Earth's sky. But the Trifid Nebula is too faint to be seen by the unaided eye. Over 75 hours of image data captured under dark night skies was used to create this stunning telescopic view. Watch: The Perseid Meteor Shower
※ 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。