雪山阿爾卑斯山上的三座天拱
Three Sky Arches over Snowy Alps
來源：Angel Fux｜發表日期：2026-04-21
為什麼天空中會有三道拱形光帶，而不是兩道？上個月，一位熱愛冒險的天文攝影師乘坐直升機抵達瑞士與義大利邊境附近的阿爾卑斯山峰後，本以為當晚能看到兩道銀河拱形光帶。一道是左側朝向銀河系中心的內拱，通常在日出前可見；另一道是右側的外拱，通常在日落後可見。 但實際出現的卻是三道拱形。這位驚訝的天文攝影師很快意識到，天空如此漆黑，以至於一道完整的微弱黃道光也清晰可見——那是被太陽系內塵埃散射的陽光。而這道光巧妙地將兩道銀河拱形連線在了一起！ 次日清晨，一架直升機將這位天文攝影師接回。經過 40 小時的後期處理和合成，當晚拍攝的影像最終呈現出了這張以三重拱形為特色、覆蓋 360 度的全景圖。 拼圖景觀：每日天文謎題
原文：Why are there three arches across the sky instead of two? Last month, after being dropped off by a helicopter at a high mountain peak in the Alps near the Swiss Italian border, an adventurous astrophotographer expected two arches of our Milky Way galaxy to be visible during the night. These were the inner arch looking in toward the center of our galaxy on the left, visible just before sunrise, and the outer arch on the right visible just after sunset. But there were three arches. The surprised astrophotographer soon realized that the sky was so dark that an entire arc of faint zodiacal light was also noticeable -- sunlight scattered by inner Solar System dust. And it artfully connected the two Milky Way arches! The next morning a helicopter picked the astrophotographer back up, and after 40 hours of processing and combining that night's images, the featured triple-arch 360-degree panorama resulted. Jigsaw Vistas: 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。