In today's image, we see the two moons of Mars, Phobos and Deimos as one passes in front of the other causing an eclipse. An eclipse can occur anywhere where one object passes in front of another. However, it is generally reserved for two objects of comparable size.

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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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