反輻射光束西班牙上空的彩虹扇
Anticrepuscular Rays: A Rainbow Fan over Spain

來源:Julene Eiguren|發表日期:2025-02-04
是的,但你的彩虹能做到嗎?晚些時候,太陽像往常一樣落向西方。然而,在這一天,更有趣的景象出現在周圍 180 度的地方--東方。在那裡,不僅能看到彩虹,還能看到從彩虹中心發出的令人印象深刻的反折射光線。在這張來自西班牙北部萊凱提奧的照片中,太陽位於鏡頭後方。彩虹是由落雨反射回來的陽光形成的。反折射光線是由於陽光被雲層遮擋,一直繞過天空,越過頭頂,似乎匯聚到了對面的地平線上--這是一種視覺錯覺。 彩虹本身會讓人興奮不已,而反折射光線則是一種罕見的享受,但同時捕捉到這兩種光線則更加不同尋常--看起來既寧靜又超現實。 拼圖挑戰:每日天文拼圖
原文:Yes, but can your rainbow do this? Late in the day, the Sun set as usual toward the west. However, on this day, the more interesting display was 180 degrees around -- toward the east. There, not only was a rainbow visible, but an impressive display of anticrepuscular rays from the rainbow's center. In the featured image from Lekeitio in northern Spain, the Sun is behind the camera. The rainbow resulted from sunlight reflecting back from falling rain. Anticrepuscular rays result from sunlight, blocked by some clouds, going all the way around the sky, overhead, and appearing to converge on the opposite horizon -- an optical illusion. Rainbows by themselves can be exciting to see, and anticrepuscular rays a rare treat, but capturing them both together is even more unusual -- and can look both serene and surreal. Jigsaw Challenge: Astronomy Puzzle of the Day
※ 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。