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Ptah

(33,891 posts)
Sun Jul 27, 2025, 08:31 PM Jul 27

Astronomy Picture of the Day - 2025 July 27 - Lightning over the Volcano of Water [View all]

Astronomy Picture of the Day 2025 July 27



Lightning over the Volcano of Water

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.


https://apod.nasa.gov/apod/ap250727.html
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