In today's image, we see Io as imaged by the Galileo Spacecraft back in 1999. This shows Io in true color as would be seen by the typical human eye. Io is the most volcanically active object in our solar system, being turned inside out by the tidal forces from Jupiter's strong gravity.

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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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