Copyright:
原文:
An old Moon and the stars of Orion rose above the eastern horizon on August 10. The Moon’s waning crescent was still bright enough to be overexposed in this snapshot taken from another large satellite of planet Earth, the International Space Station. A greenish airglow traces the atmosphere above the limb of the planet’s night. Below, city lights and lightning flashes from thunderstorms appear over southern Mexico. The snapshot also captures the startling apparition of a rare form of upper atmospheric lightning, a large red sprite caught above a lightning flash at the far right. While the space station’s orbital motion causes the city lights to blur and trail during the exposure, the extremely brief flash of the red sprite is sharp. Now known to be associated with thunderstorms, much remains a mystery about sprites including how they occur, their effect on the atmospheric global electric circuit, and if they are somehow related to other upper atmospheric lightning phenomena such as blue jets or terrestrial gamma flashes.
中文翻譯:
🌙✨ 在8月10日，一輪古老的月亮和獵戶座的星星從東方地平線升起。月亮的殘缺月華仍然足夠明亮，以至於在這張從地球另一個大型衛星國際空間站拍攝的快照中過度曝光。綠色的空氣輝光勾勒出地球夜空的邊緣。下面，墨西哥南部的城市燈光和雷陣雨的閃電驚現。這張快照還捕捉到一種罕見的上層大氣閃電現象——在右邊的閃電上方出現了一個大型紅色火精靈（sprite）。雖然國際空間站的軌道運動使城市燈光在曝光中模糊並拉出光跡，但紅色火精靈的瞬間閃光卻是清晰的。這種被認為與雷陣雨有關的現象仍然充滿了謎團，包括它是如何發生的、對全球大氣電路有何影響，以及它是否與其他上層大氣閃電現象如藍色噴流（blue jets）或地球伽瑪射線閃光（terrestrial gamma flashes）有關。
#月亮 #獵戶座 #國際空間站 #火精靈 #大氣科學 #雷陣雨 #城市燈光 #神秘現象 #科學探索 #星空夢想
來源:NASA每日圖片
