一個三角形突出物在太陽上空盤旋
A Triangular Prominence Hovers Over the Sun
來源:Andrea Vanoni|發表日期:2024-09-02
為什麼會有一個三角形盤旋在太陽上空? 雖然形狀不尋常,但結構型別並不尋常:它是不斷演變的太陽突出物的一部分。 太陽上的環形磁場會引導高能粒子流,有時會將發光的氣態結構保持在高空數月之久。 日珥之所以會發出耀眼的光芒,是因為它含有特別熱、特別緻密或不透明的太陽等離子體。令人驚訝的三角形結構發生在上週。這個標誌性的突出物比我們的地球還大,被幾位太陽攝影師拍攝下來,並被美國宇航局的太陽動力學觀測站記錄下來,在大約一天的時間裡形成並劇烈消散。這張特寫圖片是用氫發出的強烈紅光拍攝的。 下圖中,太陽纖維為太陽的色球鋪上了地毯,相比之下,背景天空非常暗淡,看不到星星。 太陽表面今年相當活躍。
原文:Why is there a triangle hovering over the Sun? Although the shape is unusual, the type of structure is not: it is part of an evolving solar prominence. Looping magnetic fields on the Sun channel the flow of energetic particles, sometimes holding glowing gaseous structures aloft for months. A prominence glows brightly because it contains particularly hot, dense, or opaque solar plasma. The surprising triangular structure occurred last week. Larger than our Earth, the iconic prominence was imaged by several solar photographers and documented by NASA's Solar Dynamic Observatory to form and violently dissipate in about a day. The featured image was captured in a color of red light emitted strongly by hydrogen. Below, solar fibrils carpet the Sun's chromosphere, while the background sky is so faint in comparison that no stars are visible. Our Sun's surface has been quite active this year.
※ 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。