In today's image, we see the Manicouagan impact crater as seen from the International Space Station. The crater, about 100km across has worn down over the past 200 million years so that we just see the remnants of the crater in the form of a circular lake. Because of weathering and erosion, craters last a much shorter time on Earth than on our Moon.

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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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