In today's image, we see the largest of the two moons of Mars with the planet in the background. Phobos is in a very low and decaying orbit and will eventually end up crashing into the planet and being destroyed in about 50 million years.

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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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