太陽之舞
Sun Dance
發表日期:2024-07-28
有時,太陽表面似乎在跳舞。例如, 2012 年年中,美國國家航空航天局的太陽軌道太陽動力學觀測站太空飛行器拍攝到了一個令人印象深刻的突出物,它似乎像一個雜技舞蹈演員一樣在進行奔跑俯衝翻滾。 在這段時長約三小時的延時影片中,我們用紫外線捕捉到了這一戲劇性的爆炸。一個迴圈磁場引導著太陽上的熱等離子體流。舞動的突出體規模巨大--整個地球都可以輕鬆地容納在流動的熱氣體拱門之下。 靜止的日珥通常會持續一個月左右,並可能爆發日冕物質拋射(CME),將熱氣排入太陽系。 產生太陽突出的能量機制仍是一個研究課題。 與 2012 年一樣,今年的太陽表面再次相當活躍,出現了許多細絲和日珥。
原文:Sometimes, the surface of our Sun seems to dance. In the middle of 2012, for example, NASA's Sun-orbiting Solar Dynamic Observatory spacecraft imaged an impressive prominence that seemed to perform a running dive roll like an acrobatic dancer. The dramatic explosion was captured in ultraviolet light in the featured time-lapse video covering about three hours. A looping magnetic field directed the flow of hot plasma on the Sun. The scale of the dancing prominence is huge -- the entire Earth would easily fit under the flowing arch of hot gas. A quiescent prominence typically lasts about a month and may erupt in a Coronal Mass Ejection (CME), expelling hot gas into the Solar System. The energy mechanism that creates a solar prominence is still a topic of research. Like in 2012, this year the Sun's surface is again quite active and features many filaments and prominences.
※ 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。