Cassini flies over Iapetus' equatorial ridge
amateur image processing,
As Cassini flew by Iapetus on September 10, 2007, it took 13 images of the equatorial ridge rising over the horizon. Most of the flight is over Iapetus' dark terrain, but at the very end of the animation, the white flanks of the Voyager moutains begin to appear.
NASA / JPL / SSI / Animation by Emily Lakdawalla
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Original image data dated on or about September 10, 2007