In today's image, we see lightning in the sky over the Volcano of Water. Lightning forms when electrical charges are separated within clouds and then discharge violently, with columns of air being heated to temperatures higher than that of the surface of our Sun.

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This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

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