In today's image, we see the aurora and constellation in the sky over the Arctic Henge in Iceland. The aurora are caused by charged particles from the Sun which follow along Earth's magnetic field toward the north and south magnetic poles. When these particles strike atoms in Earth's atmosphere, they cause it to glow, giving us the colors of the aurora.

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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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