In today's image, we see one of the moons of Saturn known as Iapetus. This moon has some interesting structures giving it a passing resemblance to perhaps a walnut. In addition, it has two distinct sides - one bright white and icy and the other very dark and sooty.

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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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