挪威上空的极光和银河
(原标题: Aurora and Milky Way over Norway)
2023-12-12
浏览次数: 19
天空中那两个巨大的拱门是什么？也许更熟悉的是左边的，是我们银河系的中心带。这个由恒星和星云组成的巨大圆盘似乎包围了南部的大部分天空。在恒星拱门下方可见的是锈橙色的火星和延伸的仙女座星系。但这一夜有更多！在这个寒冷的北极夜晚的几分钟里，第二个巨大的拱形出现在了北方天空的一部分：极光。极光比恒星要近得多，因为它们是由地球大气层高处的发光空气组成的。在绿色的极光拱门外可见的是一群被称为北斗七星的恒星。这张由20张图像组成的特色数字合成照片于2022年11月中旬在挪威罗弗敦群岛上空拍摄。APOD年度回顾（2023）：RJN的夜空网络讲座
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What are these two giant arches across the sky? Perhaps the more familiar one, on the left, is the central band of our Milky Way Galaxy. This grand disk of stars and nebulas here appears to encircle much of the southern sky. Visible below the stellar arch is the rusty-orange planet Mars and the extended Andromeda galaxy. But this night had more! For a few minutes during this cold arctic night, a second giant arch appeared encircling part of the northern sky: an aurora. Auroras are much closer than stars as they are composed of glowing air high in Earth's atmosphere. Visible outside the green auroral arch is the group of stars popularly known as the Big Dipper. The featured digital composite of 20 images was captured in mid-November 2022 over the Lofoten Islands in Norway. APOD Year in Review (2023): RJN's Night Sky Network Lecture
© Giulio Cobianchi