美麗的三葉草
A Beautiful Trifid
來源：Jesús Carmona Guillén｜發表日期：2024-07-04
美麗的三葉星雲是一項對比鮮明的宇宙研究。它也被稱為 M 20 ，位於大約 5000 光年遠的星雲豐富的人馬座。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：氫原子發出的光為主的紅色發射星雲，塵埃反射星光產生的藍色反射星雲，以及濃密塵埃雲呈現剪影的暗星雲。不過，紅色發射區被遮蔽的塵埃道大致分為三部分，這也是三葉星雲得名的原因。在著名的哈勃太空望遠鏡拍攝的三葉星雲特寫圖片中，發射星雲中心上方和右側出現了由新生恆星雕刻而成的星柱和噴流。三葉星雲直徑約 40 光年。由於太暗淡，肉眼無法看到，它幾乎覆蓋了地球天空中一輪滿月的面積。
原文：The beautiful Trifid Nebula is a cosmic study in contrasts. Also known as M20, it 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. But the red emission region, roughly separated into three parts by obscuring dust lanes, is what lends the Trifid its popular name. Pillars and jets sculpted by newborn stars, above and right of the emission nebula's center, appear in famous Hubble Space Telescope close-up images of the region. The Trifid Nebula is about 40 light-years across. Too faint to be seen by the unaided eye, it almost covers the area of a full moon on planet Earth's sky.
※ 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。