瑞典上空的綠色極光
Green Aurora over Sweden
來源：Göran Strand｜發表日期：2024-05-22
它又亮又綠，在天空中綿延不絕。這一引人注目的極光是 2016 年在瑞典厄斯特松德郊外拍攝的。六個攝影區域被合併在一起，形成了橫跨近 180 度的特色全景。 該極光尤其引人注目的方面包括其橫掃的弧形和鮮明的清晰度。 在前景中可以看到斯托斯約恩湖，而在遙遠的背景中，透過極光可以看到幾個熟悉的星座和北極星。 巧合的是，極光似乎避開了左下方的月亮。 極光出現的前一天，太陽日冕上出現了一個大洞，使得高能粒子流向太陽系。 極光的綠色是由氧原子與地球大氣層高處的環境電子重新結合造成的。 您的天空驚喜你的生日是哪一天？
原文：It was bright and green and stretched across the sky. This striking aurora display was captured in 2016 just outside of Östersund, Sweden. Six photographic fields were merged to create the featured panorama spanning almost 180 degrees. Particularly striking aspects of this aurora include its sweeping arc-like shape and its stark definition. Lake Storsjön is seen in the foreground, while several familiar constellations and the star Polaris are visible through the aurora, far in the background. Coincidently, the aurora appears to avoid the Moon visible on the lower left. The aurora appeared a day after a large hole opened in the Sun's corona, allowing particularly energetic particles to flow out into the Solar System. The green color of the aurora is caused by oxygen atoms recombining with ambient electrons high in the Earth's atmosphere. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
※ 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。