水火山上的閃電
Lightning over the Volcano of Water
發表日期：2025-07-27
你曾驚歎地看過閃電風暴嗎？ 你並不孤單。有關閃電成因的詳細資料仍在研究之中，但我們已經知道，在某些雲層內部，內部上升氣流會導致冰雪之間的碰撞，使雲頂和雲底之間的電荷慢慢分離。很快就會產生快速放電，這就是閃電。 閃電通常呈鋸齒狀，迅速將薄薄的氣柱加熱到太陽表面溫度的三倍左右。 由此產生的衝擊波以超音速啟動，然後衰減為巨大的雷聲。 全世界平均每分鐘在雲層和地球之間發生約 6000 次閃電。圖為 2019 年 7 月的雙圖合成，閃電源自瓜地馬拉水火山（Volcán de Agua）頂部附近的通訊天線。 天空驚奇你的生日是哪一天？
原文：Have you ever watched a lightning storm in awe? You're not alone. Details of what causes lightning are still being researched, but it is known that inside some clouds, internal updrafts cause collisions between ice and snow that slowly separate charges between cloud tops and bottoms. The rapid electrical discharges that are lightning soon result. Lightning usually takes a jagged course, rapidly heating a thin column of air to about three times the surface temperature of the Sun. The resulting shock wave starts supersonically and decays into the loud sound known as thunder. On average, around the world, about 6,000 lightning bolts occur between clouds and the Earth every minute. Pictured in July 2019 in a two-image composite, lightning stems from communication antennas near the top of Volcán de Agua (Volcano of Water) in Guatemala. 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。