The Cassini spacecraft returned hundreds of images from its September 10, 2007, flyby of Saturn's two-toned moon Iapetus.

This is a raw, or unprocessed, image taken by the Cassini spacecraft during its close flyby of Saturn's moon Iapetus.

Images show a surface that is heavily cratered, along with the mountain ridge that runs along the moon's equator.

This flyby was nearly 100 times closer to Iapetus than Cassini's 2004 flyby, bringing the spacecraft to about 1,640 kilometers (1,000 miles) from the surface.

--NASA/JPL/Space Science Institute and SPACE.com Staff

Credit:NASA/JPL/Space Science Institute