來自平流層的北極光
Northern Lights from the Stratosphere

來源:Ralf Rohner|發表日期:2024-01-18
1 月 15 日從地球平流層拍攝的夜空中北極光閃耀。該照片是在加拿大溫尼伯上空的一架飛機上用手持相機拍攝的,單次曝光時間為 5 秒。在曝光過程中,下方的陸地光沿著高速飛行的飛機的運動方向留下五顏六色的軌跡。在更遠的地平線上,高能粒子沿著地球磁場在地球兩極地區加速,激發了原子氧,形成了閃閃發光的北極光。極光特有的綠色是在 100 - 300 公里的高空產生的,紅色則是在更高的高空和更低的大氣密度下產生的。微弱恆星的光輝沿著銀河系的平面在夜空中劃出一道弧線,而仙女座星系則將這一北方天景延伸到銀河系外的空間。在左上方可以看到仙女座星系的一抹散光,它是離銀河系最近的大型旋渦星系。
原文:Northern lights shine in this night skyview from planet Earth's stratosphere, captured on January 15. The single, 5 second exposure was made with a hand-held camera on board an aircraft above Winnipeg, Canada. During the exposure, terrestrial lights below leave colorful trails along the direction of motion of the speeding aircraft. Above the more distant horizon, energetic particles accelerated along Earth's magnetic field at the planet's polar regions excite atomic oxygen to create the shimmering display of Aurora Borealis. The aurora's characteristic greenish hue is generated at altitudes of 100-300 kilometers and red at even higher altitudes and lower atmospheric densities. The luminous glow of faint stars along the plane of our Milky Way galaxy arcs through the night, while the Andromeda galaxy extends this northern skyview to extragalactic space. A diffuse hint of Andromeda, the closest large spiral to the Milky Way, can just be seen to the upper left.
※ 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!
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