In today's image, we see the asteroid Ida with its moon, Dactyl. This moon was discovered in 1993 when the Galileo spacecraft flew by the asteroid on its way to Jupiter and was able in discover the moon. We now know of many asteroid that have moon like the one we see here today.

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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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