In today's image, we see Olympus Mons on Mars. This is the largest volcano in the solar system, much larger than any volcano on Earth or Venus. It can become so large because of the lack of plate motions on Mars which are what give us volcanic island chain such as the Hawaiian Islands here on Earth.

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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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